VirtualBox v4.1.22 is released. VirtualBox is a general-purpose full virtualizer for x86/x64 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software.

VirtualBox v4.1.22 Changelog:
This is a maintenance release. The following items were fixed and/or added since VirtualBox 4.1.20:
- 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, bug #9897)
- 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 (bug #10808)

Download: VirtualBox v4.1.22
Source: Here