This is a maintenance release. 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; bug #11674)
• GUI: fixed a crash on shutdown
• GUI: prevent stuck keys under certain conditions on Windows hosts (bugs #2613, #6171)
• 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 (bug #7462)
• USB: fixed hang during isochronous transfer with certain devices (4.1 regression; Windows hosts only; bug #11839)
• USB: properly handle orphaned URBs (bug #11207)
• 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 (bug #11832)
• Storage: fixed lost writes if iSCSI is used with snapshots and asynchronous I/O (bug #11479)
• Storage: fixed accessing certain VHDX images created by Windows 8 (bug #11502)
• Storage: fixed hang when creating a snapshot using Parallels disk images (bug #9617)
• 3D: seamless + 3D fixes (bug #11723)
• 3D: version 4.2.12 was not able to read saved states of older versions under certain conditions (bug #11718)
• Main/Properties: don't create a guest property for non-running VMs if the property does not exist and is about to be removed (bug #11765)
• Main/Properties: don't forget to make new guest properties persistent after the VM was terminated (bug #11719)
• 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() (bug #10845)
• Main/OVF: don't create invalid appliances by stripping the file name if the VM name is very long (bug #11814)
• Main/OVF: don't fail if the appliance contains multiple file references (bug #10689)
• 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 (bug #11610)
• 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; bug #11709)
• X11 Additions: reduced the CPU load of VBoxClient in drag'and'drop mode
• OS/2 Additions: made the mouse wheel work (bug #6793)
• Guest Additions: fixed problems copying and pasting between two guests on an X11 host (bug #11792)