VirtualBox, an open source x86 virtualization project available for free has just hit version 4.1.20. The new version, a 101.3 megabyte download, features the following fixes and changes:
– VMM: fixed a crash under rare circumstances for VMs running without hardware virtualization.
– VMM: fixed a code analysis bug for certain displacement instructions for VMs running without hardware virtualization.
– VMM: fixed an interpretion bug for TPR read instructions under rare conditions (AMD-V only).
– Snapshots: fixed a crash when restoring an old snapshot when powering off a VM (bugs #9604, #10491).
– VBoxSVC: be more tolerant against environment variables with strange encodings (bug #8780).
– VGA: fixed wrong access check which might cause a crash under certain conditions.
– NAT: final fix for crashes under rare conditions (bug #10513).
– Virtio-net: fixed the problem with receiving of GSO packets in Windows XP guests causing packet loss in host-to-VM transfers.
– HPET: several fixes (bugs #10170, #10306).
– Clipboard: disable the clipboard by default for new VMs.
– BIOS: the PCI BIOS was not properly detected with the chipset type set to ICH9 (bugs #9301, #10327).
– Mac OS X hosts: adaptions to OS X 10.8 Mountain Lion.
– Linux Installer: fixes for Gentoo Linux (bug #10642).
– Linux guests: fixed mouse integration on Fedora 17 guests (bug #2306).
– Linux Additions: compile fixes for RHEL/CentOS 6.3 (bug #10756).
– Linux Additions: compile fixes for Linux 3.5-rc1 and Linux 3.6-rc1 (bug #10709).
– Solaris host: fixed a guru meditation while allocating large pages (bug #10600).
– Solaris host: fixed possible kernel panics while freeing memory.
– Solaris Installer: fixed missing icon for menu and desktop shortcuts.
VirtualBox 4.1.20 is available for free and requires an Intel-based Mac running Mac OS X 10.5 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.