VirtualBox 6.0.6 for PC Windows

# The following items were fixed and/or added:
* VMM: more work on improving the emulation of certain MSR registers
* VMM: fixed a VERR_INVALID_RPL Guru Meditation when booting certain guests
* VMM: experimental support for SSE 4.1 / SSE 4.2 passthrough, see the manual for more information how to enable it
* VMM: fix for recent Linux kernels with software virtualization
* GUI: experimental HID LEDs synchronization for Windows hosts, see the manual for more information
* GUI: warn the user if the Oracle Extension Pack is not installed and the user tries to activate the remote display feature
* GUI: make sure that a minimized guest (using mini toolbar in fullscreen/seamless mode) keeps the minimized state
* GUI: popup banner's "do not show this message again" check-box replaced with corresponding button
* GUI: network adapter cables can now be connected/disconnected directly through the running virtual machine Devices / Network menu a Network status-bar indicator
* GUI: the new VM wizard now proposes 64-bit guests on 64-bit hosts by default; better distinction between 32-bit OS types 64-bit OS types
* GUI: better error message if appliance import fails
* GUI: allow to set host-combination to 'None' using the Global settings / Input page
* GUI: don't switch the guest to a black screen during online snapshot merge (4.3 regression)
* VBoxManage: when exporting an appliance, support the suppression of MAC addresses, which means they will be always recreated on import, avoiding duplicate MAC addresses for VMs which are imported several times
* AHCI: fixed a VM hang during suspend under certain circumstances
* AHCI: fixed a VM hang during online snapshot merge under certain circumstances
* AHCI: fixed a bug which resulted in Windows XP guest hangs if a SATA CDROM is attached
* AHCI: fixed a Guru Meditation under certain conditions
* AHCI: ejecting a CD/DVD medium failed under certain conditions
* AHCI: disk hotplugging fixes
* NAT: transparent handling of host sleep/resume and network configuration changes if the dnsproxy is enabled or if the hostresolver is used
* NAT: fixed crash and misbehaviour under some circumstances with ICMP packets having TTL=1
* NAT Network: fixed IPv6 reassembly
* NAT Network: ping proxy implemented
* OVF: fixed reading of the OVF 0.9 section element (4.3 regression)
* OVF: several fixes
* 3D: several fixes, multiscreen fixes
* 3D: include 3D content in captured videos
* 3D: include 3D content in captured screenshot
* VGA: proper handling of legacy graphics modes if the Guest Additions are active
* USB: fixed crash during isochronous transfer under rare circumstances
* BIOS: better disk geometry handling of SCSI drives
* API: fix crashes in Java API clients using the XPCOM binding, happened with output parameters only
* VBoxSVC: documented the handling of host power management events (see the manual for more information) and added an extradata item for configuring the handling of the battery-low event
* VBoxSVC: fixed a bug which could trigger a crash if a VM snapshot was restored the second time and the VM has associated bandwidth groups
* VBoxSVC: properly detect ifconfig if located in /bin
* Shared Folders: fixed a failure to restore transient shared folders when starting a VM from a saved state
* Mac OS X hosts: fixed issue when the application icon was frozen in the dock if the bridging interface was not connected to a network
* Linux hosts: also consider the physical package ID when determining the number of physical CPU cores
* Linux hosts / guests: don't warn in kernel log if memory allocation fails
* Solaris hosts: fixed the autostart SMF script
* Windows hosts: fixes for non-ANSI code page user names and similar environment contents
* Windows hosts / guests: fixed setting and using a guest user's process environment variables (relevant for Guest Control)
* Windows Additions: fixed handle leaks in VBoxTray
* Windows Additions: fixed a crash while detecting active guest users
* Windows Additions: fixed restoring backed up D3D files on XPDM -> WDDM upgrade
* Guest Control: fixed setting and using a guest user's process environment variables
* Linux Additions: support Enterprise Linux 6.5 kernels
* Linux Additions: fixed CPU hot-remove on newer Linux kernels
* Linux / Solaris Additions: don't automount a shared folder which is already mounted
* X11 Additions: support X.Org Server 1.15

# The following items were fixed and/or added:
* VMM: more work on improving the emulation of certain MSR registers
* VMM: fixed a VERR_INVALID_RPL Guru Meditation when booting certain guests
* VMM: experimental support for SSE 4.1 / SSE 4.2 passthrough
* VMM: fix for recent Linux kernels with software virtualization
* GUI: experimental HID LEDs synchronization for Windows hosts
* GUI: warn the user if the Oracle Extension Pack is not installed and the user tries to activate the remote display feature
* GUI: make sure that a minimized guest (using mini toolbar in fullscreen/seamless mode) keeps the minimized state
* GUI: popup banner’s “do not show this message again” check-box replaced with corre-sponding button
* GUI: network adapter cables can now be connected/disconnected directly through the run-ning virtual machine Devices / Network menu a Network status-bar indicator
* GUI: the new VM wizard now proposes 64-bit guests on 64-bit hosts by default; better distinction between 32-bit OS types 64-bit OS types
* GUI: better error message if appliance import fails
* VBoxManage: when exporting an appliance, support the suppression of MAC addresses, which means they will be always recreated on import, avoiding duplicate MAC addresses for VMs which are imported several times
* Storage: fixed a VM hang during suspend under certain circumstances if the AHCI con-troller is used
* AHCI: fixed a bug which resulted in Windows XP guest hangs if a SATA CDROM is attached
* AHCI: fixed a Guru Meditation under certain conditions
* AHCI: ejecting a CD/DVD medium failed under certain conditions
* AHCI: disk hotplugging fixes
* NAT: transparent handling of host sleep/resume and network configuration changes if the dnsproxy is enabled or if the hostresolver is used
* NAT: fixed crash and misbehaviour under some circumstances with ICMP packets having TTL=1
* NAT Network: fixed IPv6 reassembly
* NAT Network: ping proxy implemented
* OVF: fixed reading of the OVF 0.9 section element (4.3 regression)
* OVF: several fixes
* 3D: several fixes, multiscreen fixes
* 3D: include 3D content in captured videos
* 3D: include 3D content in captured screenshot
* VGA: proper handling of legacy graphics modes if the Guest Additions are active
* USB: fixed crash during isochronous transfer under rare circumstances
* BIOS: better disk geometry handling of SCSI drives
* API: fix crashes in Java API clients using the XPCOM binding, happened with output pa-rameters only
* VBoxSVC: documented the handling of host power management events and added an extradata item for configuring the handling of the battery-low event
* VBoxSVC: fixed a bug which could trigger a crash if a VM snapshot was restored the second time and the VM has associated bandwidth groups
* Shared Folders: fixed a failure to restore transient shared folders when starting a VM from a saved state
* Mac OS X hosts: fixed issue when the application icon was frozen in the dock if the bridging interface was not connected to a network
* Linux hosts: also consider the physical package ID when determining the number of physical CPU cores
* Linux hosts / guests: don’t warn in kernel log if memory allocation fails
* Solaris hosts: fixed the autostart SMF script
* Windows hosts: fixes for non-ANSI code page user names and similar environment contents
* Windows hosts / guests: fixed setting and using a guest user’s process environment variables (relevant for Guest Control)
* Windows Additions: fixed handle leaks in VBoxTray
* Windows Additions: fixed a crash while detecting active guest users
* Windows Additions: fixed restoring backed up D3D files on XPDM -> WDDM upgrade
* Guest Control: fixed setting and using a guest user’s process environment variables
* Linux Additions: support Enterprise Linux 6.5 kernels
* Linux Additions: fixed CPU hot-remove on newer Linux kernels
* Linux / Solaris Additions: don’t automount a shared folder which is already mounted
* X11 Additions: support X.Org Server 1.15

# The following items were fixed and/or added:
* VMM: fixed a Guru Meditation VINF_EM_TRIPLE_FAULT caused by VMCB caching with nested paging on certain AMD CPUs
* VMM: fixed a Guru Meditation VERR_VMX_UNEXPECTED_INTERRUPTION_EXIT_TYPE while intercepting debug exceptions (VT-x only)
* VMM: fixed a Guru Meditation VERR_SVM_UNEXPECTED_EXIT while intercepting debug register accesses (AMD-V only)
* VMM: fixed a VERR_SSM_STRUCTURE_MAGIC error when trying to load a saved state made with VBox 4.3.4 when VT-x/AMD-V is disabled. Unfortunately, VBox 4.3.4 produced broken saved states for this configuration so you have to discard these states
* VMM: added a few more MSRs to the whitelist required by certain guests
* GUI: fixed deleting of inaccessible VMs (4.3 regression)
* GUI: fixed warnings in VM settings / number of guest processors
* Main: don't automatically enable 64-bit guests on 64-bit hosts if VT-x/AMD-V is not available
* Main: always expose the DMI memory information to Windows 2012 guests
* Main: fixed occasional crashes on guest display resolution change
* Main: fixed reporting back temporary name when calling IGuestSession::DirectoryCreateTemp()
* API: fix for a hang when launching a GUI VM through the API, which crashes due to GUI unavailability
* Storage: fix for BLKCACHE_IOERR runtime errors under rare circumstances
* Network: allow to start more than 5 PCNet instances
* E1000: if the cable was disconnected before the guest initialized the device, the link status was not properly set to 'down' after the initialization completed despite the fact that there was no connection
* 3D support: fixed offset of guest 3D image elements (Mac OS X Retina hosts only)
* Solaris hosts: fixed accessing the host driver from non-global zones (4.3 regression)

# The following items were fixed and/or added:
* VMM: fix for a bug in the Local APIC emulation causing a BSOD when booting certain guests (4.3.0 regression)
* VMM: fixed loading of saved states if VT-x/AMD-V was disabled (4.3.2 regression)
* VMM: fixed single-stepping inside the guest for certain instructions (VT-x only)
* VMM: fixed a performance issue involving APIC accesses after rebooting a VM (4.3.0 regression; VT-x only)
* VMM: fixed TPR patching to be enabled for 32-bit guests even when the chosen guest type is 64-bit (4.3.0 regression; AMD-V only)
* VMM: fixed occasional VINF_EM_TRIPLE_FAULT errors on hosts without the unrestricted guest execution feature
* GUI: don't bother the user with the BPP warning if no Guest Additions are installed
* GUI: fixed machine-window paint artifacts on VM reboot / guest-screen resize
* GUI: make sure the assigned license and description are attached to the exported appliance
* GUI: fixed bugs in close VM action restrictions handling
* GUI: fixed incorrect wizards text colors for some unusual look and feel styles
* GUI: should restore seamless mode as soon as possible after VM reboot or shutdown
* GUI: fixes for medium enumeration
* GUI: the OS X hot corners were not accessible while a VirtualBox VM is running (Mac OS X hosts only)
* GUI: fixed an old bug which bared the host from cleanly shutdown / reboot if the VM selector window is open (Mac OS X hosts only)
* Host-only Networking: fixed creating of host-only network interfaces (4.3.0 regression)
* NAT: don't run into an infinite loop in case the host cannot access any DNS server (4.3.0 regression)
* NAT: don't re-connect the cable if the DNS information changes and the cable was disconnected before (4.3.0 regression)
* NAT: fixed several issues with automatically starting / terminating of NAT networks on VM start / stop and configuration changes
* VBoxNetDHCP: don't block prevent VBoxSVC from terminating
* 2D Video acceleration: fix crashes on presentation mode switches
* BusLogic: allow to run VMs with more than one BusLogic SCSI controller enabled
* Keyboard: fixed a VM crash if a VM was resumed from a saved state where at least one key was pressed
* VBoxSVC: fixed a heap corruption under certain conditions (4.3.0 regression)
* VBoxSVC: fixed a race leading to a hang during initialization
* OVF: fixed import logic for OVF appliances containing multiple VMs
* OVF: improved logic for finding an appropriate image format during OVF import
* API: block the removal of the current snapshot if it has child snapshots (only relevant for VMs without snapshottable hard disks, their presence always prevented removal), which resulted in VM configuration corruption
* API: mark VM configurations with snapshots but without current snapshot as inaccessible, as this combination is nonsense
* API: fixed information for some automatically generated events (only with XPCOM, Windows host was not affected), which caused errors when getting some of the attributes over the webservice
* SDK: extended the functionality coverage for the C bindings
* Guest Control: various bug fixes and improved VBoxManage help
* Windows hosts: another attempt to fix the massive DPC latency
* Windows host installer: make registering file extensions optional
* Mac OS X hosts: properly sign the kernel extensions for Mavericks hosts
* Mac OS X hosts: fixed a bug where the VirtualBox dock icon was not properly removed from the dock after a VM terminated preventing Mavericks hosts from shutting down
* Mac OS X hosts: fixed minor installer issue
* Linux hosts / guests: Linux 3.13 compile fixes
* Linux guests: build the vboxvideo kernel module correctly on OL/RHEL 6.1 guests
* Linux guests: make 3D work on Slackware 14.1
* Guest Additions/3D: fixed an occasional dead-lock
* Windows Additions/3D: fixed possible memory leaking
* Windows Additions/XPDM: use separate tables containing valid video modes for each virtual monitor
* Windows Additions: fixed automatic logins for Vista and newer Windows guests

# The following items were fixed and/or added:
* VMM: fixed restoring of the auxiliary TSC MSR in VT-x that caused host BSODs on Windows 8.1 hosts and unpredictable behavior on other hosts
* VMM: provide fake values for a couple of MSRs to make more guests happy on certain hosts
* VMM: fixed detection of VT-x on certain machines where the BIOS would not set the VMX LOCK feature bit, which affected the VM settings in the GUI
* VMM: fixed TPR threshold which caused BSODs on Windows XP guests that use the I/O APIC (VT-x only)
* VMM: fixed PATM saved state incompatibility for software virtualized VMs
* VMM: don't fail if AMD-V isn't available if the VM is configured to use software virtualization
* GUI: fixed guest resize breakage on visual representation mode change (when switching from normal to fullscreen etc)
* GUI: make sure the guest screen is resized after restoring a VM from a saved state if the host screen size changed
* GUI: disabled SCROLL LED sync from HID LEDs synchronization (Mac OS X hosts only)
* Webcam passthrough improvements including GUI support (see the manual for more information)
* Guest Control: implemented more IGuestSession methods
* Guest Control: added support for deleting and renaming guest files + directories in VBoxManage
* Guest Control: various bugfixes
* API: incorrect handling of hardware UUID default value, resulting in an all zero DMI/SMBIOS UUID, which leads to Windows requesting re-activation
* 3D support: fixed crash on shutdown if 2D video acceleration is enabled (Mac OS X hosts only)
* 3D support: miscellaneous fixes
* Storage: fixed detection of CD/DVD media when switching from an empty to a host drive with passthrough enabled
* Storage: fixed hang of the VM process when the disk is full under certain circumstances
* NAT: listen for changes of NAT Network setting at runtime
* NAT: NAT Network DHCP server now saves leases to a persistent storage
* Main: monitor changes in host DNS configuration
* Mac OS X host: reworked a mechanism of adding a VM desktop alias from the VM selector
* Mac OS X installer: remove old kernel extensions during upgrade
* Linux Additions: correctly set umask before installing
* X11 Additions/3D: fix freezes starting 3D desktop
* X11 Additions/3D: fix depth buffer support
* X11 Additions/3D: fix Age Of Empires 3 rendering
* Windows Additions/3D: fix Google Earth plugin rendering
* Windows Additions/WDDM: autoresize fixes

# The following major new features were added:
* VMM: major rewrite of the VT-x code and the AMD-V code including many bug fixes and performance improvements
* VMM: introduced a lightweight instruction interpreter for situations not handled by hardware virtualization
* GUI: extended messaging mechanism (new non-modal popup overlays used to show non-critical warnings and provide user with additional information)
* GUI: keyboard shortcuts management (input page of global preferences extended with possibility to edit general keyboard shortcuts for VirtualBox Manager and Virtual Machine)
* GUI: video capturing support
* Added USB touch device emulation
* Added experimental support for webcam passthrough complementing USB passthrough (see the manual for more information)
* Added SCSI CD-ROM emulation, including boot support
* VRDP: support for IPv6
* Guest Control: guest sessions now are running in dedicated, impersonated session processes (needs at least Guest Additions 4.3 installed)
* Guest Control: implemented IGuestFile support
* NAT: experimental virtual router mode: several VMs are attached to the same internal network and share one NAT service
# In addition, the following items were fixed and/or added:
* VMM: significantly improved performance of NetWare 5.x/6.x guests on host systems without nested paging support
* VMM: fixed losing host NMIs while in VT-x guest-context
* VMM: changed order of actions in emulated task switch
* VMM: allow to activate VT-x while in SMX mode and provide more information if that is not possible
* GUI: update check uses https
* GUI: numerous minor internal cleanups and bug fixes
* GUI: HID LEDs synchronization when switching between guest window(s) and host (Mac OS X hosts only)
* GUI, VBoxManage: when unregistering a VM, also unregister the hard disk images which are used exclusively
* GUI: use the number of physical presented processor cores instead of the number of logical processor cores to check if the users assigned too many virtual CPUs to the guest
* Snapshots: made live snapshots work again
* Teleportation: made it work again
* Storage: implemented AHA-154x compatibility mode in the emulated BusLogic SCSI HBA
* Storage: significantly improved performance of large ATAPI PIO transfers (BeOS, Minix 3 guests affected)
* Storage: added floppy formatting emulation (NB: cannot be used to change existing media geometry)
* Settings: global and per-VM default frontend configuration, useful to select the use of alternative VM frontends
* Settings: limit depth of snapshot tree to 250 levels, as more will lead to decreased performance and may trigger crashes
* Settings: the per-VM hwvirtextexcl setting has been replaced by a global hwvirtexclusive property
* Main: new event queue implementation which does not use the host's native event queue for processing VirtualBox events anymore
* Main: eliminate the use of SysV semaphores on all host OSes other than Windows, namely Linux, Solaris and Mac OS X, with the consequence that no system reconfiguration is needed to run more than approximately 100 VMs
* Main: use the XDG standard configuration folder instead of .VirtualBox on systems where it is appropriate
* Main: extension pack framework can now support loading HGCM modules
* VBoxManage: list more information about hard disk/DVD/floppy media, and support the --long option to show really all available details
* VBoxManage: added support for optional command line parameters for the automatic Guest Additions update
* VBoxManage: added support for listing active guest sessions, guest processes and/or guest files via guestcontrol list <all|sessions|processes|files>
* VBoxManage: added support for closing active guest sessions via guestcontrol session close --session-id <ID> | --session-name <name or pattern> | --all
* VBoxManage: added support for terminating active guest processes via guestcontrol process kill|close|terminate --session-id <ID>| --session-name <name or pattern> <PID> ... <PID n> or guestcontrol [p[s]]kill --session-id <ID>| --session-name <name or pattern> <PID> ... <PID n>
* VBoxManage: added support for watching guest sessions via guestcontrol watch
* VBoxManage: added modifyvm --triplefaultreset to make the VM reset on triple fault instead of triggering a Guru Meditation
* 3D support: several fixes
* 3D support: several fixes for Mac OS X hosts
* OVF: several fixes
* Extpack Installer: make it work if the file is located in a folder with special characters
* Keyboard: fix for reporting key sequences like Ctrl+Alt+Del for the USB keyboard emulation
* Shared Clipboard/X11: support for BMP-format images
* Mac OS X hosts: limited support for Mac OS X 10.9
* Mac OS X hosts: use a launchd script instead of the deprecated StartupItem mechanism
* Windows hosts: don't cause massive DPC latency (only on certain hosts; still needs improving)
* Windows hosts: consider symlinks when retrieving volume information
* Windows hosts: fixed an issue with USB2 devices being inaccessible when plugged into USB 3.0 ports
* Windows Additions: fixed misbehavior with guest display power management (WDDM driver only)
* Windows Additions: fixed memory leak caused by WTSQuerySessionInformation() on Windows 2000 guests
* Windows Additions: ability to track guest user idle times through the newly introduced event IGuestUserStateChangedEvent
* Linux Additions: fixed udev detection in the init script with Linux 3.x kernels

# The following major new features were added:
* VMM: major rewrite of the VT-x code and the AMD-V code including many bug fixes and performance improvements
* VMM: introduced a lightweight instruction interpreter for situations not handled by hardware virtualization
* GUI: extended messaging mechanism (new non-modal popup overlays used to show noncritical warnings and provide user with additional information)
* GUI: keyboard shortcuts management (input page of global preferences extended with possibility to edit general keyboard shortcuts for VirtualBox Manager and Virtual Machine)
* GUI: video capturing support
* Added USB touch device emulation
* Added SCSI CD-ROM emulation, including boot support
* VRDP: support for IPv6
* Guest Control: guest sessions now are running in dedicated, impersonated session processes (needs at least Guest Additions 4.3 installed)
* Guest Control: implemented IGuestFile support
* NAT: experimental virtual router mode: several VMs are attached to the same internal network and share one NAT service
# In addition, the following items were fixed and/or added:
* VMM: significantly improved performance of NetWare 5.x/6.x guests on host systems without nested paging support
* VMM: fixed losing host NMIs while in VT-x guest-context
* VMM: changed order of actions in emulated task switch
* GUI: update check uses https
* GUI: numerous minor internal cleanups and bug fixes
* GUI, VBoxManage: when unregistering a VM, also unregister the hard disk images which are used exclusively
* GUI: use the number of physical presented processor cores instead of the number of logical processor cores to check if the users assigned too many virtual CPUs to the guest
* Snapshots: made live snapshots work again
* Teleportation: made it work again
* Storage: implemented AHA-154x compatibility mode in the emulated BusLogic SCSI HBA
* Storage: significantly improved performance of large ATAPI PIO transfers (BeOS, Minix 3 guests affected)
* Storage: added floppy formatting emulation (NB: cannot be used to change existing media geometry)
* Settings: global and per-VM default frontend configuration, useful to select the use of alternative VM frontends
* Settings: limit depth of snapshot tree to 250 levels, as more will lead to decreased performance and may trigger crashes
* Settings: the per-VM hwvirtextexcl setting has been replaced by a global hwvirtexclusive property
* Main: new event queue implementation which does not use the host’s native event queue for processing VirtualBox events anymore
* Main: eliminate the use of SysV semaphores on all host OSes other than Windows, namely Linux, Solaris and Mac OS X, with the consequence that no system reconfiguration is needed to run more than approximately 100 VMs
* Main: use the XDG standard configuration folder instead of .VirtualBox on systems where it is appropriate
* Main: extension pack framework can now support loading HGCM modules
* VBoxManage: list more information about hard disk/DVD/floppy media, and support the --long option to show really all available details
* VBoxManage: added support for optional command line parameters for the automatic Guest Additions update
* VBoxManage: added support for listing active guest sessions, guest processes and/or guest files via guestcontrol list <all|sessions|processes|files>
* VBoxManage: added support for closing active guest sessions via guestcontrol session close --session-id <ID>| --session-name <name or pattern>|--all
* VBoxManage: added support for terminating active guest processes via guestcontrol process kill|close|terminate --session-id <ID>| --session-name <name or pattern> <PID> ... <PID n> or guestcontrol [p[s]]kill --session-id <ID>| --session-name <name or pattern> <PID> ... <PID n>
* VBoxManage: added support for watching guest sessions via guestcontrol watch
* 3D support: several fixes
* 3D support: several fixes for Mac OS X hosts
* OVF: several fixes
* Extpack Installer: make it work if the file is located in a folder with special characters
* Keyboard: fix for reporting key sequences like Ctrl+Alt+Del for the USB keyboard emulation
* Shared Clipboard/X11: support for BMP-format images, contributed by François Revol
* Windows hosts: don’t cause massive DPC latency (only on certain hosts; still needs improving)
* Windows hosts: consider symlinks when retrieving volume information
* Windows hosts: fixed an issue with USB2 devices being inaccessible when plugged into USB 3.0 ports
* Windows Additions: fixed misbehavior with guest display power management (WDDM driver only)
* Windows Additions: fixed memory leak caused by WTSQuerySessionInformation() on Windows 2000 guests
* Linux Additions: fixed udev detection in the init script with Linux 3.x kernels
* Windows guests: ability to track guest user idle times through the newly introduced event IGuestUserStateChangedEvent

# The following major new features were added:
* VMM: major rewrite of the VT-x code and the AMD-V code including many bug fixes and performance improvements
* GUI: extended messaging mechanism (new non-modal popup overlays used to show non-critical warnings and provide user with additional information)
* GUI: keyboard shortcuts management (input page of global preferences extended with possibility to edit general keyboard shortcuts for VirtualBox Manager and Virtual Machine)
* GUI: video capturing support
* Added USB touch device emulation
* Added SCSI CD-ROM emulation, including boot support
* VRDP: support for IPv6
* Guest Control: guest sessions now are running in dedicated, impersonated session pro-cesses (needs at least Guest Additions 4.3 installed)
* Guest Control: implemented IGuestFile support
* NAT: experimental virtual router mode: several VMs are attached to the same internal network and share one NAT service
# In addition, the following items were fixed and/or added:
* VMM: properly handle NMIs on Linux hosts with X2APIC enabled
* VMM: significantly improved performance of NetWare 5.x/6.x guests on host systems with-out nested paging support
* VMM: fixed losing host NMIs while in VT-x guest-context
* VMM: changed order of actions in emulated task switch
* GUI: update check uses https
* GUI: numerous minor internal cleanups and bug fixes
* GUI, VBoxManage: when unregistering a VM, also unregister the hard disk images which are used exclusively
* Snapshots: made live snapshots work again
* Teleportation: made it work again
* Storage: implemented AHA-154x compatibility mode in the emulated BusLogic SCSI HBA
* Storage: significantly improved performance of large ATAPI PIO transfers (BeOS, Minix 3 guests affected)
* Storage: added floppy formatting emulation (NB: cannot be used to change existing media geometry)
* Settings: global and per-VM default frontend configuration, useful to select the use of alternative VM frontends
* Settings: limit depth of snapshot tree to 250 levels, as more will lead to decreased perfor-mance and may trigger crashes
* Settings: the per-VM hwvirtextexcl setting has been replaced by a global hwvirtexclusive property
* Main: new event queue implementation which does not use the host’s native event queue for processing VirtualBox events anymore
* Main: eliminate the use of SysV semaphores on all host OSes other than Windows, namely
* Linux, Solaris and Mac OS X, with the consequence that no system reconfiguration is needed to run more than approximately 100 VMs
* Main: use the XDG standard configuration folder instead of .VirtualBox on systems where it is appropriate
* Main: extension pack framework can now support loading HGCM modules
* VBoxManage: list more information about hard disk/DVD/floppy media, and support the --long option to show really all available details
* VBoxManage: added support for optional command line parameters for the automatic Guest Additions update
* VBoxManage: added support for listing active guest sessions, guest processes and/or guest files via guestcontrol list <all|sessions|processes|files>
* VBoxManage: added support for closing active guest sessions via guestcontrol session close --session-id <ID>| --session-name <name or pattern>|--all
* VBoxManage: added support for terminating active guest processes via guestcontrol process kill|close|terminate --session-id <ID>| --session-name <name or pattern> <PID> ... <PID n> or guestcontrol [p[s]]kill --session-id <ID>| --session-name <name or pattern> <PID> ... <PID n>
* VBoxManage: added support for watching guest sessions via guestcontrol watch
* 3D support: several fixes
* 3D support: several fixes for Mac OS X hosts
* OVF: several fixes
* Keyboard: fix for reporting key sequences like Ctrl+Alt+Del for the USB keyboard emula-tion
* Shared Clipboard/X11: support for BMP-format images, contributed by François Revol
* Windows hosts: don’t cause massive DPC latency (only on certain hosts; still needs improv-ing)
* Windows hosts: consider symlinks when retrieving volume information
* Windows hosts: fixed an issue with USB2 devices being inaccessible when plugged into USB 3.0 ports
* Windows Additions: fixed misbehavior with guest display power management (WDDM driver only)
* Linux Additions: fixed udev detection in the init script with Linux 3.x kernels
* Windows guests: ability to track guest user idle times through the newly introduced event IGuestUserStateChangedEvent

# The following major new features were added:
* VMM: major rewrite of the VT-x code and the AMD-V code including many bug fixes and performance improvements
* GUI: extended messaging mechanism (new non-modal popup overlays used to show noncritical warnings and provide user with additional information)
* GUI: keyboard shortcuts management (input page of global preferences extended with possibility to edit general keyboard shortcuts for VirtualBox Manager and Virtual Machine)
* GUI: video capturing support
* Added USB touch device emulation
* Added SCSI CD-ROM emulation, including boot support
* VRDP: support for IPv6
* Guest Control: guest sessions now are running in dedicated, impersonated session processes (needs at least Guest Additions 4.3 installed)
* Guest Control: implemented IGuestFile support
* NAT: experimental virtual router mode: several VMs are attached to the same internal network and share one NAT service (see chapter 6.4, Network Address Translation Service (experimental)
# In addition, the following items were fixed and/or added:
* VMM: properly handle NMIs on Linux hosts with X2APIC enabled
* VMM: significantly improved performance of NetWare 5.x/6.x guests on host systems without nested paging support
* VMM: fixed losing host NMIs while in VT-x guest-context
* VMM: changed order of actions in emulated task switch
* GUI: update check uses https
* GUI: numerous minor internal cleanups and bug fixes
* GUI, VBoxManage: when unregistering a VM, also unregister the hard disk images which are used exclusively
* Snapshots: made live snapshots work again
* Teleportation: made it work again
* Storage: implemented AHA-154x compatibility mode in the emulated BusLogic SCSI HBA
* Storage: significantly improved performance of large ATAPI PIO transfers (BeOS, Minix 3 guests affected)
* Storage: added floppy formatting emulation (NB: cannot be used to change existing media geometry)
* Settings: global and per-VM default frontend configuration, useful to select the use of alternative VM frontends
* Settings: limit depth of snapshot tree to 250 levels, as more will lead to decreased performance and may trigger crashes
* Settings: the per-VM hwvirtextexcl setting has been replaced by a global hwvirtexclusive property
* Main: new event queue implementation which does not use the host’s native event queue for processing VirtualBox events anymore
*Main: use the XDG standard configuration folder instead of .VirtualBox on systems where it is appropriate
* Main: extension pack framework can now support loading HGCM modules
* VBoxManage: list more information about hard disk/DVD/floppy media, and support the --long option to show really all available details
* VBoxManage: added support for optional command line parameters for the automatic Guest Additions update
* VBoxManage: added support for listing active guest sessions, guest processes and/or guest files via guestcontrol list <all|sessions|processes|files>
* VBoxManage: added support for closing active guest sessions via guestcontrol session close --session-id <ID>| --session-name <name or pattern>|--all
* VBoxManage: added support for terminating active guest processes via guestcontrol process kill|close|terminate --session-id <ID>| --session-name <name or pattern> <PID> ... <PID n> or guestcontrol [p[s]]kill --session-id <ID>| --session-name <name or pattern> <PID> ... <PID n>
* VBoxManage: added support for watching guest sessions via guestcontrol watch
* 3D support: several fixes
* 3D support: several fixes for Mac OS X hosts
* OVF: several fixes
* Keyboard: fix for reporting key sequences like Ctrl+Alt+Del for the USB keyboard emulation
* Shared Clipboard/X11: support for BMP-format images, contributed by François Revol
* Windows hosts: don’t cause massive DPC latency (only on certain hosts; still needs improving)
* Windows hosts: consider symlinks when retrieving volume information
* Windows hosts: fixed an issue with USB2 devices being inaccessible when plugged into USB 3.0 ports
* Windows Additions: fixed misbehavior with guest display power management (WDDM driver only)
* Linux Additions: fixed udev detection in the init script with Linux 3.x kernels
* Windows guests: ability to track guest user idle times through the newly introduced event IGuestUserStateChangedEvent

# The following items were fixed and/or added:
- VMM: properly handle NMIs on Linux hosts with X2APIC enabled
- VMM: fixed potential crashes with 64-bit guests on 32-bit hosts
- GUI / seamless: properly handle mouse wheel scroll events
- GUI, VBoxManage: when unregistering a VM, also unregister the hard disk images which are used exclusively
- GUI: prevent crashes under certain conditions on X11 hosts
- 3D: multiscreen fixes (incorrect mouse position, flickers)
- 3D Support: several fixes for the Windows WDDM video driver (multiscreen, seamless)
- Snapshots: made live snapshots work again
- Teleportation: made it work again
- VBoxManage: on snapshot take, --pause is default and --live is for doing live snapshots
- VBoxSVC: don't crash on systems with many VLAN interfaces (Solaris hosts only)
- Network: after the host resumes from suspend, disconnect and reconnect the virtual network cables to force renewing the DHCP leases for the guests. So far only Mac OS X hosts and Windows hosts.
- NAT: on name server changes force a reconnect of the virtual network cable to notify the guest (Mac OS X hosts only)
- Mac OS X installer: keep previously installed Extension Packs on VirtualBox upgrade
- Linux hosts / guests: Linux 3.11 fixes
- Solaris hosts: fixed a potential kernel panic caused due to unexpected preemption due to logging.
- Windows hosts: fixed an issue with USB2 devices being inaccessible when plugged into USB3 ports.
- Linux Additions: added PCI device identifier to vboxvideo.ko fixing DRI initialization under certain conditions
- Linux Additions: fixed udev detection in the init script with Linux 3.x kernels

# The following major new features were added:
* VMM: major rewrite of the VT-x code including many bug fixes and performance improvements
* GUI: keyboard shortcuts management (input page of global preferences extended with
* possibility to edit general keyboard shortcuts for VirtualBox Manager and Virtual Machine)
* GUI: extended messaging mechanism (new non-modal popup overlays used to show noncritical warnings and provide user with additional information)
* GUI: video capturing support
* GUI: host touch devices support (GUI passes host touch-events to guest)
* Emulated USB touch devices
* VRDP: support for IPv6
* NAT: experimental virtual router mode: several VMs are attached to the same internal network and share one NAT service
# In addition, the following items were fixed and/or added:
* VMM: properly handle NMIs on Linux hosts with X2APIC enabled
* GUI: update check uses https
* GUI: lot of internal stuff rewritten (cleanup and bug-fixes)
* Settings: global and per-VM default frontend configuration, useful to select the use of alternative VM frontends
* Settings: limit depth of snapshot tree to 250 levels, as more will lead to decreased performance and may trigger crashes
* Main: new event queue implementation which does not use the host’s native event queue for processing VirtualBox events anymore
* Main: use the XDG standard configuration folder instead of .VirtualBox on systems where it is appropriate
* VBoxManage: list more information about hard disk/DVD/floppy media, and support the--long option to show really all available details
* VBoxManage: added support for optional command line parameters for the automatic Guest Additions update
* VBoxManage: added support for listing active guest sessions, guest processes and/or guest files via guestcontrol list <all|sessions|processes|files>
* VBoxManage: added support for closing active guest sessions via guestcontrol session close --session-id <ID>| --session-name <name or pattern>|--all
* VBoxManage: added support for terminating active guest processes via guestcontrol process kill|close|terminate --session-id <ID>| --session-name <name or pattern> <PID> ... <PID n> or guestcontrol [p[s]]kill --session-id <ID>| --session-name <name or pattern> <PID> ... <PID n>
* VBoxManage: added support for watching guest sessions via guestcontrol watch
* 3D support: several fixes
* 3D support: several fixes for Mac OS X hosts
* OVF: several fixes
* Keyboard: fix for reporting key sequences like Ctrl+Alt+Del for the USB keyboard emulation
* Shared Clipboard/X11: support for BMP-format images, contributed by François Revol
* Windows hosts: don’t cause massive DPC latency
* Windows hosts: consider symlinks when retrieving volume information
* Windows Additions: fixed misbehavior with guest display power management (WDDM driver only)
* Windows guests: ability to track guest user idle times through the newly introduced event IGuestUserStateChangedEvent

# The following items were fixed and/or added:
* OVF/OVA: don't crash on import if no manifest is used (4.2.14 regression)
* GUI: do not restore the current snapshot if we power-off after a Guru Mediation
* Storage: fixed a crash when hotplugging an empty DVD drive to the VM
* Storage: fixed a crash when a guest read from a DVD drive attached to the SATA controller under certain circumstances
* EFI: don't fail with 64-bit guests on 32-bit hosts
* Autostart: fixed VM startup on OS X
* Windows hosts: native Windows 8 controls
* Windows hosts: restore native style on Vista 32
* Windows hosts / guests: Windows 8.1 adaptions
* Mac OS X hosts: after removing VirtualBox with VirtualBox_Uninstall.tool, remove it from the pkgutil --pkgs list as well

# The following items were fixed and/or added:
* VMM: another TLB invalidation fix for non-present pages
* VMM: fixed a performance regression (4.2.8 regression)
* GUI: fixed a crash on shutdown
* GUI: prevent stuck keys under certain conditions on Windows hosts
* VRDP: fixed a rare crash on the guest screen resize
* VRDP: allow to change VRDP parameters (including enabling/disabling the server) if the VM is paused
* USB: fixed passing through devices on Mac OS X host to a VM with 2 or more virtual CPUs
* USB: fixed hang during isochronous transfer with certain devices (4.1 regression; Windows hosts only)
* USB: properly handle orphaned URBs
* BIOS: fixed function for returning the PCI interrupt routing table (fixes NetWare 6.x guests)
* BIOS: don't use the ENTER / LEAVE instructions in the BIOS as these don't work in the real mode as set up by certain guests (e.g. Plan 9 and QNX 4)
* DMI: allow to configure DmiChassisType
* Storage: fixed lost writes if iSCSI is used with snapshots and asynchronous I/O
* Storage: fixed accessing certain VHDX images created by Windows 8
* Storage: fixed hang when creating a snapshot using Parallels disk images
* 3D: seamless + 3D fixes (bug #11723)
* 3D: version 4.2.12 was not able to read saved states of older versions under certain conditions
* Main/Properties: don't create a guest property for non-running VMs if the property does not exist and is about to be removed
* Main/Properties: don't forget to make new guest properties persistent after the VM was terminated
* Main/Display: don't lose seamless regions during screen resize
* Main/OVF: don't crash during import if the client forgot to call Appliance::interpret()
* Main/OVF: don't create invalid appliances by stripping the file name if the VM name is very long
* Main/OVF: don't fail if the appliance contains multiple file references
* Main/Metrics: fixed Solaris file descriptor leak
* Settings: limit depth of snapshot tree to 250 levels, as more will lead to decreased performance and may trigger crashes
* VBoxManage: fixed setting the parent UUID on diff images using sethdparentuuid
* Linux hosts: work around for not crashing as a result of automatic NUMA balancing which was introduced in Linux 3.8
* Windows installer: force the installation of the public certificate in background (i.e. completely prevent user interaction) if the --silent command line option is specified
* Windows Additions: fixed problems with partial install in the unattended case
* Windows Additions: fixed display glitch with the Start button in seamless mode for some themes
* Windows Additions: Seamless mode and auto-resize fixes
* Windows Additions: fixed trying to to retrieve new auto-logon credentials if current ones were not processed yet
* Windows Additions installer: added the /with_wddm switch to select the experimental WDDM driver by default
* Linux Additions: fixed setting own timed out and aborted texts in information label of the lightdm greeter
* Linux Additions: fixed compilation against Linux 3.2.0 Ubuntu kernels (4.2.12 regression as a side effect of the Debian kernel build fix)
* X11 Additions: reduced the CPU load of VBoxClient in drag'and'drop mode
* OS/2 Additions: made the mouse wheel work
* Guest Additions: fixed problems copying and pasting between two guests on an X11 host

# The following items were fixed and/or added:
- VMM: fixed a Guru Meditation on putting Linux guest CPU online if nested paging is disabled
- VMM: invalidate TLB entries even for non-present pages
- GUI: Multi-screen support: fixed a crash on visual-mode change
- GUI: Multi-screen support: disabled guest-screens should now remain disabled on visual-mode change
- GUI: Multi-screen support: handle host/guest screen plugging/unplugging in different visual-modes
- GUI: Multi-screen support: seamless mode: fixed a bug when empty seamless screens were represented by fullscreen windows
- GUI: Multi-screen support: each machine window in multi-screen configuration should have correct menu-bar now (Mac OS X hosts)
- GUI: Multi-screen support: machine window View menu should have correct content in seamless/fullscreen mode now (Mac OS X hosts)
- GUI: VM manager: vertical scroll-bars should be now updated on content/window resize
- GUI: VM settings: fixed crash on machine state-change event
- GUI: don't show warnings about enabled or disabled mouse integration if the VM was restored from a saved state
- Virtio-net: properly announce that the guest has to handle partial TCP checksums
- Storage: Fixed incorrect alignment of VDI images causing disk size changes when using snapshots
- Audio: fixed broken ALSA & PulseAudio on some Linux hosts due to invalid symbol resolution
- PS/2 keyboard: re-apply keyboard repeat delay and rate after a VM was restored from a saved state
- BIOS: updated DMI processor information table (type 4): corrected L1 & L2 cache table handles
- Timekeeping: fix several issues which can lead to incorrect time, Solaris guests sporadically showed time going briefly back to Jan 1 1970
- Main/Metrics: disk metrics are collected properly when software RAID, symbolic links or rootfs are used on Linux hosts
- VBoxManage: don't stay paused after a snapshot was created and the VM was running before
- VBoxManage: introduced controlvm nicpromisc
- VBoxManage: don't crash on controlvm guestmemoryballoon if the VM isn't running
- VBoxHeadless: don't filter guest property events as this would affect all clients
- Guest control: prevent double CR in the output generated by guest commands and do NLS conversion
- Linux hosts / guests: fixed build errors on Linux 3.5 and newer kernels if the CONFIG_UIDGID_STRICT_TYPE_CHECKS config option is enabled
- Linux Additions: handle fall-back to VESA driver on RedHat-based guests if vboxvideo cannot be loaded
- Linux Additions: RHEL/OEL/CentOS 6.4 compile fix
- Linux Additions: Debian Linux kernel 3.2.0-4 (3.2.39) compile fix
- Linux Additions: added auto-logon support for Linux guests using LightDM as the display manager
- Windows Additions: Support for multimonitor. Dynamic enable/disable of secondary virtual monitors. Support for XPDM/WDDM based guests
- X11 Additions: support X.Org Server 1.14

# The following items were fixed and/or added:
* GUI: fixed keyboard with XQuartz X server
* Main/Display: fixed a crash with multi-monitors under certain conditions (Mac OS X hosts only)
* Main/Properties: fixed a crash under certain conditions, for example after wakeup from host hibernate
* Settings: don't lose the internal network settings if they are not currently active
* Storage: another incompatibility fix for VHD differencing images with Hyper-V
* VBoxManage: don't read beyond the end of the file specified with export --eulafile
* Linux hosts / guests: Linux 3.9-rc0 compile fixes
* Linux Additions: fixed two warnings in the shared folders guest kernel module
* Linux Additions: don't crash VBoxService if libdbus is not available
* Windows Additions: fixed upgrading MultiMedia Redirection (MMR) support