VirtualBox, an open source x86 virtualization project available for free has just hit version 4.1.12. The new version, a 89.5 megabyte download, features the following fixes and changes:

- VMM: fixed VERR_NOT_SUPPORTED and VERR_RAW_MODE_INVALID_SMP guru meditation due to an invalid reschedule to raw mode (bug #10370).

- VMM: fixed PDMCritSectLeave guru meditation under rare circumstances with SMP guests.

- VMM: proper Math Fault handling with certain legacy guests (bug #9042).

- NAT: fixed a socket leak under certain conditions.

- Storage: better sanity check against reading beyond end-of-file.

- Audio: fixed a crash in the NUL audio backend (bug #10374; 4.1.10 regression).

- HGCM: fixed a crash during savestate under rare circumstances.

- VBoxSVC: several locking fixes.

- VBoxManage: return the correct error code if controlvm savestate failed (bug #10134).

- Guest Additions: VBoxService should not crash on exit (bug #10326; 4.1.10 regression).

- Windows Additions: set the correct time stamp when a file is closed (bug #6473).

- Windows Additions: better help if the DirectX backups are not properly installed.

- Linux Additions: Linux 3.4-rc1 compile fixes.

VirtualBox 4.1.12 is available for free and requires Mac OS X 10.4 or later and an Intel-based Mac to install and run.

If you’ve tried the new version and have any feedback, please let us know.