VirtualBox 4.3.8 RC1

# 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