VirtualBox 4.2.8.83876

# 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)