Oracle has released the latest version of its VirtualBox software. VirtualBox 4.3.10.92957 sees significant improvements in the VMM and some interesting experimental features. Here is the full list of changes and additions:

• VMM: more work on improving the emulation of certain MSR registers on certain host CPUs
• VMM: fixed single-stepping for real-mode guests (VT-x without unrestricted guest execution) and some I/O instructions
• VMM: fixed a potential problem with COW pages if nested paging is not available
• GUI: experimental HID LEDs synchronization for Windows and Mac OS X hosts: fixed keyboard re-synchronization if the feature is disabled (as done by default)
• GUI: fixed a potential crash when opening the preferences menu
• OVF: fixed a crash of the VirtualBox Manager when re-starting guest export
• 3D support: several fixes
• HGCM: fixed a problem with saved states which could cause several guest misbehavior after a VM was started from a saved state
• Storage: fixed a bug preventing to compact differential snapshots under certain conditions
• VBoxSVC: fixed a segmentation fault on Linux hosts if a very long path exists under /dev
• API: fixed guest misbehavior under certain conditions if a storage medium was attached or removed at VM runtime
• Windows installer: make the –silent parameter work again
• Windows Additions: fixed the environment for guest processes (4.3.8 regression)
• Windows Additions/WDDM: fixed divide by zero exception with multiple guest screens under certain conditions
• X11 Additions: fix for the VBoxClient process not exiting correctly (bug #12348) and consuming too much processor time

VirtualBox 4.3.10.92957 is available to download