VirtualBox 6.0.6 for PC Windows

# This is a maintenance release. The following items were fixed and/or added:
* VMM: fixed guest crash with huge amount of guest RAM on VT-x hosts
* GUI: fixed a layout bug in the Mac OS X clone VM dialog
* GUI: not all the translation tags were taken into account during the language switch
* GUI: take guest screenshot dialog sometimes had no keyboard input available on Windows host
* Main/Machine: fix generation of spurious event for inaccessible VMs which triggered an endless event generation loop in cooperation with the GUI which became unresponsive (4.2.6 regression)
* Main/Display: fix for an access violation under certain conditions in multi-monitor configurations
* Main/Metrics: network metrics are now collected for active (up) interfaces only, the state of an interface being evaluated when the associated metric is enabled via setupMetrics
* Snapshots: reduce the time for merging snapshots under certain conditions
* Storage: fixed data corruption after resizing a VDI image under certain circumstances
* Storage: fixed non working online merging of snapshots (4.2.6 regression)
* Storage: fixed crash when connecting to certain QNAP iSCSI targets
* Storage: fixed incompatibility of VHD differencing images with Hyper-V
* Bridged Networking: fixed TCP pseudo header checksum computation for IPv6
* 3D support: fix Battlefield 1942 game crashes
* Settings: really sanitize the name of VM folders and settings file, the code was disabled before
* Settings: allow to change VRDE settings for saved VMs
* VBoxManage: don't crash during screenshotpng if there is no display
* Linux hosts: work around gcc bug 55940 which might lead to wrong kernel module code if gcc 4.7 is used to compile the 32-bit Linux host kernel
* Linux hosts: fixed inconsistent lock state and deadlock warnings on module load and VM startup when CONFIG_PROVE_LOCKING is enabled
* Linux hosts: made "]" key work again on Japanese keyboards
* Mac OS X hosts: don't crash the kernel during dtrace if the VBox kernel extensions are loaded (10.6 hosts only)
* Solaris / Mac OS X hosts: machine CPU load metrics now report 100% when all cores are fully utilized (used to be a single core)
* Solaris 11 host installer: wait for any services left over from a previous installation to be terminated to avoid confusing SMF.
* Guest Additions: don't block signals for processes executed via guest control
* Guest Additions: fixed a small memory leak in VBoxService
* Windows Additions: fixed shared folder issue with large reads/writes on 64 bit Windows guests
* Linux Additions: Linux 3.8 compile fixes
* X11 Additions: fixed blocked SIGALRM in 3D desktop sessions
* X11 Additions: fixed an unresolved reference in vboxvideo_drv for X.org 6.8 guests and before (e.g. RHEL4; 4.2.0 regression)
* X11 Additions: fixed screen automatic resizing for guests with X.org 1.3 or older (4.2.0 regression)

# The following items were fixed and/or added:
- VMM: don't inject stale VT-x events to prevent crashes after VM reset
- VMM: workaround for buggy BIOSes which enable MONITOR only for certain CPUs
- GUI: fixed trimming of anti-aliased text in details-view element headers (4.2.0 regression)
- GUI: fixed create-settings-file-alias functionality on Mac hosts (4.2.0 regression)
- GUI: fixed take-guest-screenshot functionality on Windows hosts
- GUI: several minor fixes, including palette fixes
- GUI: fixed Windows 2012 OS type
- GUI: allow to terminate the VM even if VBoxSVC crashed
- API: fixed cancelling of snapshots, previously this could lead to inconsistent VM configs
- API: fixed identifying disk images by UUID
- 3D Support: several fixes
- VRDP: fixed occasional crash with external authentication
- VGA: fix for double scan text modes
- USB: fixed invalid pending request count at the time of service of DEVICE POWER requests (Windows hosts only)
- USB keyboard: Korean keyboard workaround
- Storage: fixed hang with QCOW images and asynchronous I/O enabled
- Storage: fixed hang with newer VHD images
- Storage: actually write the non-rotational flag to the VM settings (4.2.0 regression)
- Virtio-net: fixed the problem with network statistics counters in Session Information dialog (GUI)
- Metrics: introduced network rate and disk usage metrics
- Metrics: fixed a crash under certain conditions on Solaris hosts
- BIOS: fix for El Torito
- Shared Folders: if the host folder of a shared folder mapping does not exist, keep it active but mark it as invalid to prevent inconsitent saved states
- VBoxManage: fixed converting disks from raw images
- VBoxManage: show snapshot description in the VM or snapshot information
- VBoxManage: make implicit opening of media consistent in all places dealing with media
- VBoxManage: the iSCSI initiator name was not stored in the settings file when doing storageattach
- VBoxManage: metrics collect now properly handles 'CPU/MHz' and 'Net/*/LinkSpeed' metrics
- VBoxManage: changing the image UUID or parent UUID as part of storageattach works now in all safe cases
- VBoxManage: introduced storageattach --medium additions as a shortcut to mount the additions image
- OVF: fixed importing OVF files cerated by recent VMware products
- Linux hosts / Bridged Networking: fixed the problem with leaking connections in conntrack
- Linux Additions: added support for ConsoleKit sessions in the vminfo service of VBoxService
- Linux Additions: don't crash during remount under certain conditions
- Linux/Solaris Additions: fixed guest memory metrics collection
- Solaris hosts: added a dependency to ensure that the user directories are reachable when starting VBox services
- Windows host installer: integrated user-contributed translations, thanks to all contributors!
- Windows Additions: fixed auto-logon installation for Windows 8
- Windows Additions: don't fail if the shared folders host service is not available
- Windows Additions: fixed Guest Additions startup on Windows 2000 guests
- Windows Additions: auto-resize fixes for Windows 8 guests

# The following items were fixed and/or added:
- VMM: adapted to changes in Mac OS X 10.8.2
- VMM: page fusion fixes
- GUI: disable proxy authentication for security reasons
- VRDP: fixed occasional crash during a video playback in the guest
- NAT: fixed a memory leak when disabling the NAT engine
- NAT: fixed a crash under rare circumstances (Windows hosts only)
- Virtio-net: fixed the problem with network statistics counters in Session Information dialog (GUI)
- Storage: fixed a hang during VM reset under certain circumstances
- Storage: fixed hang under rare circumstances
- Storage: fixed hang in case of unaligned requests and async I/O enabled
- Storage: fixed hang with newer VHD images
- VGA: fix for double scan text modes
- VBoxManage: fixed a memory leak when executing and waiting for a guest process
- VBoxManage: fixed converting disks from raw images
- BIOS: certain legacy guests (e.g. Windows 95) didn’t find the boot device after a warm reboot
- BIOS: don’t trash the palette in text modes when setting the border color
- USB: fixed invalid pending request count at the time of service of DEVICE POWER requests (Windows hosts only)
- OVF: fixed importing OVF files cerated by recent VMware products
- Linux hosts / guests: Linux 3.7-rc1 fixes
- Linux Additions: support X.Org Server 1.13
- Linux Additions: fixed a hang when the X server was restarted with old guest kernels
- Linux Additions: fixed a VBoxService crash during CPU hot remove
- Windows Additions: fixed Guest screen automatic resize issue for NT4
- Windows Additions: fixed auto-logon installation for Windows 8
- Windows Additions: fixed Guest Additions startup on Windows 2000 guests
- Windows Additions: don’t fail if the shared folders host service is not available

# The following items were fixed and/or added:
* GUI: fixed validation warning on global settings / proxy page (4.2.2 regression)
* GUI: fixed crash with multiple guest screens on certain conditions (OS X hosts only)
* VBoxBalloonCtrl: fixed command line argument handling of ballooning module
* VRDP: fixed occasional crash during a video playback in the guest
* BIOS: fixed broken DMI information (4.2 regression)
* BIOS: workaround for booting from Windows 2000 floppy disks
* EFI: fixed video mode selection loss on VM reboot
* Parallel: fixed parallel port printing failure/ paper queue empty error (Windows hosts only)
* NAT: fixed crash on alias-less DNS responses when host-resolver is used
* Storage: fixed hang under rare circumstances

# The following items were fixed and/or added:
- VMM: adapted to changes in Mac OS X 10.8.2
- GUI: restored VM item tool-tip functionality (4.2 regression)
- GUI: added group item tool-tip functionality
- GUI: fixed handling of the .ova/.ovf file name association (4.2 regression)
- GUI: it was not possible to change any setting before the first VM was created
- GUI: disable grouping action if all the selected items are full children list of the same group already
- GUI: added menu for runtime drag-and-drop option change
- GUI: cleanup shared-clipboard menu on visual-mode change
- GUI: make sure VM receives keyboard focus on entering fullscreen-mode on Win host
- GUI: disable proxy authentication for security reasons
- 3D Support: DrawIndexedPrimitiveUP implementation fixes for the Windows WDDM video driver
- Storage: fixed a release assertion in the AHCI emulation when requests where canceled with asynchronous I/O disabled
- Storage: fixed a hang during VM reset under certain circumstances
- NAT: fixed a crash under rare circumstances (Windows hosts only)
- NAT: automatically use the host resolver if the host name server is set to some unusual loopback value
- E1000: fixed a VirtualBox crash during intensive network transfers (4.2 regression)
- ICH9: fixed PCI bridge initialization
- USB mouse: ensure that the last mouse event doesn't get lost if no URBs are available
- BIOS: certain legacy guests (e.g. Windows 95) didn't find the boot device after a warm reboot
- BIOS: don't trash the palette in text modes when setting the border color
- EFI: fixed OS X guest autoboot (4.2 regression)
- VBoxManage: fixed output of showvminfo --machinereadable
- VBoxManage: fixed parsing of storageattach --discard
- VBoxManage: fixed wrong output of the HPET setting in showvminfo
- VBoxManage: fixed closing the guest session after executing a guest process via guest control
- VBoxShell: adaptions to interface name changes
- Guest Additions device: fixed a Guest Additions hang when a machine was reset after a crash
- Linux hosts / guests: Linux 3.7-rc1 fixes
- Linux Additions: support X.Org Server 1.13
- Linux Additions: fixed a hang when the X server was restarted with old guest kernels
- Linux Additions: fixed a VBoxService crash during CPU hot remove
- Windows Additions: fixed automatic screen resize issue for NT4 guests
- OS/2 Additions: fixed shutdown hang
- OS/2 Additions: fixed mouse driver panic
- Solaris hosts: fixed autostart service going into maintenance mode after all VMs started
- Solaris hosts: fixed linking the host driver with the dtrace module

# The following major new features were added:
* Improved Windows 8 support, in particular many 3D-related fixes
* GUI: VM groups
* GUI: expert mode for wizards
* GUI: allow to alter some settings during runtime
* Support for up to 36 network cards, in combination with an ICH9 chipset configuration
* Resource control: added support for limiting network IO bandwidth; see Section 6.9, “Limiting bandwidth for network I/O”
* Added possibility to start VMs during system boot on Linux, OS X and Solaris; see Section 9.24, “Starting virtual machines during system boot”
* Added experimental support for Drag'n'drop from the host to Linux guests. Support for more guests and for guest-to-host is planned.
* Added support for parallel port passthrough on Windows hosts
* Enhanced API for controlling the guest; please see the SDK reference and API documentation for more information
# In addition, the following items were fixed and/or added:
* Mac OS X hosts: sign application and installer to avoid warnings on Mountain Lion
* VMM: fixed a potential host crash triggered by shutting down a VM when another VM was running (only affected 32-bit hosts and 64-bit OS X hosts, 4.1 regression)
* VMM: fixed a potential host crash under a high guest memory pressure (seen with Windows 8 guests)
* VMM: improved VM context switch performance for Intel CPUs using nested paging
* VMM: added support for FlushByASID features of AMD CPUs (Bulldozer and newer)
* VMM: fixed unreal mode handling on older CPUs with VT-x (gPXE, Solaris 7/8/9)
* VMM: fixed MP tables fixes for I/O APIC interrupt routing relevant for ancient SMP guests (e.g. old OS/2 releases)
* VMM: support recent VIA CPUs
* VMM: fixed handling of task gates if VT-x/AMD-V is disabled
* VMM: page fusion fixes
* GUI: network operations manager
* GUI: allow taking screenshots of the current VM window content
* GUI: allow automatically sorting of the VM list
* GUI: allow starting of headless VMs from the GUI
* GUI: allow reset, shutdown and poweroff from the Manager window
* GUI: allow to globally limit the maximum screen resolution for guests
* GUI: show the full medium part on hovering the list of recently used ISO images
* GUI: do not create additional folders when a new machine has a separator character in its name
* GUI: don't crash on terminate if the settings dialog is still open
* GUI: consider scaled DPI values when display fonts on Windows hosts
* GUI: if a bridged network interface cannot be found, don't refuse to start the VM but allow the user to change the setting immediately
* Snapshots: fixed a crash when restoring an old snapshot when powering off a VM
* Clipboard: disable the clipboard by default for new VMs (see Section 13.3.2.3, “Clipboard”). It can be enabled at any time using the VM menu.
* Settings: sanitise the name of VM folders and settings file
* Settings: allow to store the iSCSI initiator secret encrypted
* NAT: improvements for the built-in TFTP server
* NAT: fixed memory leak when disabling the NAT engine
* E1000: 802.1q VLAN support
* Storage: implemented burning of audio CDs in passthrough mode
* Storage: fixed audio CD passthrough for certain media players
* Storage: implemented support for discarding unused image blocks through TRIM for SATA and IDE and UNMAP for SCSI when using VDI images
* Storage: added support for QED images
* Storage: added support for QCOW (full support for v1 and readonly support for v2 images)
* Storage: added readonly support for VHDX images
* USB: don't crash if a USB device is plugged or unplugged when saving or loading the VM state (SMP guests only)
* Solaris additions: added support for X.org Server 1.11 and 1.12
* Solaris additions: switched to using an in-kernel mouse driver
* Windows hosts: no need to recreate host-only adapters after a VirtualBox update
* Windows hosts: updated toolchain; make the source code compatible to VC 2010 and enable some security-related compiler options
* Windows Additions: fixed memory leak in VBoxTray

# The following major new features were added:
* Improved Windows 8 support, in particular many 3D-related fixes
* GUI: VM groups
* GUI: expert mode for wizards
* GUI: allow to alter some settings during runtime
* Support for up to 36 network cards, in combination with an ICH9 chipset configuration
* Resource control: added support for limiting network IO bandwidth; see Section 6.9, “Limiting bandwidth for network I/O”
* Added possibility to start VMs during system boot on Linux, OS X and Solaris; see Section 9.24, “Starting virtual machines during system boot”
* Added experimental support for Drag'n'drop from the host to Linux guests. Support for more guests and for guest-to-host is planned.
* Added support for parallel port passthrough on Windows hosts
* Enhanced API for controlling the guest; please see the SDK reference and API documentation for more information
# In addition, the following items were fixed and/or added:
* Mac OS X hosts: sign application and installer to avoid warnings on Mountain Lion
* VMM: fixed a potential host crash triggered by shutting down a VM when another VM was running (only affected 32-bit hosts and 64-bit OS X hosts, 4.1 regression)
* VMM: fixed a potential host crash under a high guest memory pressure (seen with Windows 8 guests)
* VMM: improved VM context switch performance for Intel CPUs using nested paging
* VMM: added support for FlushByASID features of AMD CPUs (Bulldozer and newer)
* VMM: fixed unreal mode handling on older CPUs with VT-x (gPXE, Solaris 7/8/9)
* VMM: fixed MP tables fixes for I/O APIC interrupt routing relevant for ancient SMP guests (e.g. old OS/2 releases)
* VMM: support recent VIA CPUs
* VMM: fixed handling of task gates if VT-x/AMD-V is disabled
* GUI: network operations manager
* GUI: allow taking screenshots of the current VM window content
* GUI: allow automatically sorting of the VM list
* GUI: allow starting of headless VMs from the GUI
* GUI: allow reset, shutdown and poweroff from the Manager window
* GUI: allow to globally limit the maximum screen resolution for guests
* GUI: show the full medium part on hovering the list of recently used ISO images
* GUI: do not create additional folders when a new machine has a separator character in its name
* GUI: don't crash on terminate if the settings dialog is still open
* GUI: consider scaled DPI values when display fonts on Windows hosts
* GUI: if a bridged network interface cannot be found, don't refuse to start the VM but allow the user to change the setting immediately (bug )
* Snapshots: fixed a crash when restoring an old snapshot when powering off a VM
* Clipboard: disable the clipboard by default for new VMs (see Section 13.3.2.3, “Clipboard”). It can be enabled at any time using the VM menu.
* Settings: sanitise the name of VM folders and settings file
* Settings: allow to store the iSCSI initiator secret encrypted
* NAT: improvements for the built-in TFTP server
* E1000: 802.1q VLAN support
* Storage: implemented burning of audio CDs in passthrough mode
* Storage: fixed audio CD passthrough for certain media players
* Storage: implemented support for discarding unused image blocks through TRIM for SATA and IDE and UNMAP for SCSI when using VDI images
* Storage: added support for QED images
* Storage: added support for QCOW (full support for v1 and readonly support for v2 images)
* Storage: added readonly support for VHDX images
* USB: don't crash if a USB device is plugged or unplugged when saving or loading the VM state (SMP guests only)
* Solaris additions: added support for X.org Server 1.11 and 1.12
* Solaris additions: switched to using an in-kernel mouse driver
* Windows hosts: no need to recreate host-only adapters after a VirtualBox update
* Windows hosts: updated toolchain; make the source code compatible to VC 2010 and enable some security-related compiler options
* Windows Additions: fixed memory leak in VBoxTray

# The following items were fixed and/or added:
- VMM: fixed a potential host crash triggered by shutting down a VM when another VM was running (only affected 32-bit hosts and 64-bit OS X hosts, 4.1 regression)
- VMM: fixed a potential host crash under a high guest memory pressure (seen with Windows 8 guests)
- VMM: respect RAM preallocation while restoring saved state.
- VMM: fixed handling of task gates if VT-x/AMD-V is disabled
- Storage: fixed audio CD passthrough for certain media players
- USB: don't crash if a USB device is plugged or unplugged when saving or loading the VM state (SMP guests only)
- RTC: fixed a potential corruption of CMOS bank 1
- Mac OS X hosts: installer fixes for Leopard (4.1.20 regression)
- Windows Additions: fixed memory leak in VBoxTray

# The following major new features were added:
- Improved Windows 8 support, in particular many 3D-related fixes
- GUI: VM groups
- GUI: expert mode for wizards
- GUI: allow to alter some settings during runtime
- Support for up to 36 network cards, in combination with an ICH9 chipset configuration
- Resource control: added support for limiting network IO bandwidth
- Added possibility to start VMs during system boot on Linux, OS X and Solaris
- Added experimental support for Drag'n'drop from the host to Linux guests. Support for more guests and for guest-to-host is planned.
- Added support for parallel port passthrough on Windows hosts
- Enhanced API for controlling the guest; please see the SDK reference and API documentation for more information
# In addition, the following items were fixed and/or added:
- Mac OS X hosts: sign application and installer to avoid warnings on Mountain Lion
- VMM: improved VM context switch performance for Intel CPUs using nested paging
- VMM: added support for FlushByASID features of AMD CPUs (Bulldozer and newer)
- VMM: fixed unreal mode handling on older CPUs with VT-x (gPXE, Solaris 7/8/9)
- VMM: fixed MP tables fixes for I/O APIC interrupt routing relevant for ancient SMP guests (e.g. old OS/2 releases)
- VMM: support recent VIA CPUs
- VMM: fixed handling of task gates if VT-x/AMD-V is disabled
- GUI: network operations manager
- GUI: allow taking screenshots of the current VM window content
- GUI: allow automatically sorting of the VM list
- GUI: allow starting of headless VMs from the GUI
- GUI: allow reset, shutdown and poweroff from the Manager window
- GUI: allow to globally limit the maximum screen resolution for guests
- GUI: show the full medium part on hovering the list of recently used ISO images
- GUI: do not create additional folders when a new machine has a separator character in its name
- GUI: don't crash on terminate if the settings dialog is still open
- GUI: consider scaled DPI values when display fonts on Windows hosts
- Snapshots: fixed a crash when restoring an old snapshot when powering off a VM
- Clipboard: disable the clipboard by default for new VMs. It can be enabled at any time using the VM menu.
- Settings: sanitise the name of VM folders and settings file
- Settings: allow to store the iSCSI initiator secret encrypted
- NAT: improvements for the built-in TFTP server
- E1000: 802.1q VLAN support
- Storage: implemented burning of audio CDs in passthrough mode
- Storage: fixed audio CD passthrough for certain media players
- Storage: implemented support for discarding unused image blocks through TRIM for SATA and IDE and UNMAP for SCSI when using VDI images
- Storage: added support for QED images
- Storage: added support for QCOW (full support for v1 and readonly support for v2 images)
- Storage: added readonly support for VHDX images
- Solaris additions: added support for X.org Server 1.11 and 1.12
- Solaris additions: switched to using an in-kernel mouse driver
- Windows hosts: no need to recreate host-only adapters after a VirtualBox update
- Windows hosts: updated toolchain; make the source code compatible to VC 2010 and enable some security-related compiler options

# The following major new features were added:
* Improved Windows 8 support, in particular many 3D-related fixes
* GUI: VM groups
* GUI: expert mode for wizards
* GUI: allow to alter some settings during runtime
* Support for up to 36 network cards, in combination with an ICH9 chipset configuration
* Resource control: added support for limiting network IO bandwidth; see Section 6.9, “Limiting bandwidth for network I/O”
* Added possibility to start VMs during system boot on Linux, OS X and Solaris; see Section 9.24, “Starting virtual machines during system boot”
* Added experimental support for Drag'n'drop from the host to Linux guests. Support for more guests and for guest-to-host is planned.
* Added support for parallel port passthrough on Windows hosts
* Enhanced API for controlling the guest; please see the SDK reference and API documentation for more information
# In addition, the following items were fixed and/or added:
* Mac OS X hosts: sign application and installer to avoid warnings on Mountain Lion
* VMM: improved VM context switch performance for Intel CPUs using nested paging
* VMM: added support for FlushByASID features of AMD CPUs (Bulldozer and newer)
* VMM: fixed unreal mode handling on older CPUs with VT-x (gPXE, Solaris 7/8/9; bug #9941)
* VMM: fixed MP tables fixes for I/O APIC interrupt routing relevant for ancient SMP guests (e.g. old OS/2 releases)
* VMM: support recent VIA CPUs
* GUI: network operations manager
* GUI: allow taking screenshots of the current VM window content
* GUI: allow automatically sorting of the VM list
* GUI: allow starting of headless VMs from the GUI
* GUI: allow reset, shutdown and poweroff from the Manager window
* GUI: allow to globally limit the maximum screen resolution for guests
* GUI: show the full medium part on hovering the list of recently used ISO images
* GUI: do not create additional folders when a new machine has a separator character in its name
* GUI: don't crash on terminate if the settings dialog is still open
* Snapshots: fixed a crash when restoring an old snapshot when powering off a VM
* Settings: sanitise the name of VM folders and settings file
* Settings: allow to store the iSCSI initiator secret encrypted
* E1000: 802.1q VLAN support
* Storage: implemented burning of audio CDs in passthrough mode
* Storage: implemented support for discarding unused image blocks through TRIM for SATA and IDE and UNMAP for SCSI when using VDI images
* Storage: added support for QED images
* Storage: added support for QCOW (full support for v1 and readonly support for v2 images)
* Storage: added readonly support for VHDX images
* Solaris additions: added support for X.org Server 1.11 and 1.12
* Windows hosts: no need to recreate host-only adapters after a VirtualBox update
* Windows hosts: updated toolchain; make the source code compatible to VC 2010 and enable some security-related compiler options
* NAT: improvements for the built-in TFTP server

# The following major new features were added:
* Improved Windows 8 support, in particular many 3D-related fixes
* GUI: VM groups
* GUI: expert mode for wizards
* GUI: allow to alter some settings during runtime
* Support for up to 36 network cards, in combination with an ICH9 chipset configuration
* Resource control: added support for limiting network IO bandwidth; see Section 6.9, “Limiting bandwidth for network I/O”
* Added possibility to start VMs during system boot on Linux, OS X and Solaris; see Section 9.24, “Starting virtual machines during system boot”
* Added experimental support for Drag'n'drop from the host to Linux guests. Support for more guests and for guest-to-host is planned.
* Added support for Host parallel port passthrough on Windows platform
# In addition, the following items were fixed and/or added:
* Mac OS X hosts: sign application and installer to avoid warnings on Mountain Lion
* VMM: improved VM context switch performance for Intel CPUs using nested paging
* VMM: added support for FlushByASID features of AMD CPUs (Bulldozer and newer)
* VMM: fixed unreal mode handling on older CPUs with VT-x (gPXE, Solaris 7/8/9)
* VMM: fixed MP tables fixes for I/O APIC interrupt routing relevant for ancient SMP guests (e.g. old OS/2 releases)
* VMM: support recent VIA CPUs
* GUI: network operations manager
* GUI: allow taking screenshots of the current VM window content
* GUI: allow automatically sorting of the VM list
* GUI: allow starting of headless VMs from the GUI
* GUI: allow reset, shutdown and poweroff from the Manager window
* GUI: allow to globally limit the maximum screen resolution for guests
* GUI: show the full medium part on hovering the list of recently used ISO images
* GUI: do not create additional folders when a new machine has a separator character in its name
* GUI: don't crash on terminate if the settings dialog is still open
* Snapshots: fixed a crash when restoring an old snapshot when powering off a VM
* Settings: sanitise the name of VM folders and settings file
* Settings: allow to store the iSCSI initiator secret encrypted
* E1000: 802.1q VLAN support
* Storage: implemented burning of audio CDs in passthrough mode
* Storage: implemented support for discarding unused image blocks through TRIM for SATA and IDE and UNMAP for SCSI when using VDI images
* Storage: added support for QED images
* Storage: added support for QCOW (full support for v1 and readonly support for v2 images)
* Storage: added readonly support for VHDX images
* Solaris additions: added support for X.org Server 1.11 and 1.12
* Windows hosts: no need to recreate host-only adapters after a VirtualBox update
* Windows hosts: updated toolchain; make the source code compatible to VC 2010 and enable some security-related compiler options

# The following major new features were added:
* Improved Windows 8 support, in particular many 3D-related fixes
* GUI: VM groups
* GUI: expert mode for wizards
* GUI: allow to alter some settings during runtime
* Support for up to 36 network cards, in combination with an ICH9 chipset configuration
* Resource control: added support for limiting network IO bandwidth; see the manual for more information
* Added possibility to start VMs during system boot on Linux, OS X and Solaris; see the manual for more information
* Added experimental support for Drag'n'drop from the host to Linux guests. Support for more guests and for guest-to-host is planned.
# In addition, the following items were fixed and/or added:
* VMM: improved VM context switch performance for Intel CPUs using nested paging
* VMM: added support for FlushByASID features of AMD CPUs (Bulldozer and newer)
* VMM: fixed unreal mode handling on older CPUs with VT-x (gPXE, Solaris 7/8/9)
* VMM: fixed MP tables fixes for I/O APIC interrupt routing relevant for ancient SMP guests (e.g. old OS/2 releases)
* VMM: support recent VIA CPUs
* GUI: network operations manager
* GUI: allow taking screenshots of the current VM window content
* GUI: allow automatically sorting of the VM list
* GUI: allow starting of headless VMs from the GUI
* GUI: allow reset, shutdown and poweroff from the Manager window
* GUI: allow to globally limit the maximum screen resolution for guests
* GUI: show the full medium part on hovering the list of recently used ISO images
* GUI: do not create additional folders when a new machine has a separator character in its name
* GUI: don't crash on terminate if the settings dialog is still open
* Snapshots: fixed a crash when restoring an old snapshot when powering off a VM
* Settings: sanitise the name of VM folders and settings file
* Settings: allow to store the iSCSI initiator secret encrypted
* E1000: 802.1q VLAN support
* Storage: implemented burning of audio CDs in passthrough mode
* Storage: implemented support for discarding unused image blocks through TRIM for SATA and IDE and UNMAP for SCSI when using VDI images
* Storage: added support for QED images
* Storage: added support for QCOW (full support for v1 and readonly support for v2 images)
* Storage: added readonly support for VHDX images
* Solaris additions: added support for X.org Server 1.11 and 1.12
* Windows hosts: no need to recreate host-only adapters after a VirtualBox update
* Windows hosts: updated toolchain; make the source code compatible to VC 2010 and enable some security-related compiler options