This is a maintenance release. The following items were fixed and/or added:

• 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)