VirtualBox 4.0.8.71778

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

Some of the features of VirtualBox are:

Modularity. VirtualBox has an extremely modular design with well-defined internal programming interfaces and a client/server design. This makes it easy to control it from several interfaces at once: for example, you can start a virtual machine in a typical virtual machine GUI and then control that machine from the command line, or possibly remotely. VirtualBox also comes with a full Software Development Kit: even though it is Open Source Software, you don't have to hack the source to write a new interface for VirtualBox.
Virtual machine descriptions in XML. The configuration settings of virtual machines are stored entirely in XML and are independent of the local machines. Virtual machine definitions can therefore easily be ported to other computers.

Changelog:

* Mac OS X hosts: fixed incompatibility with recent Mac OS X versions in 64-bit mode
* Mac OS X hosts: fixed incompatibility with hosts with more than 16 cores
* Mac OS X hosts: fixed painting corruptions on a second monitor in 64-bit mode
* GUI: restored functionality to set an empty host key to disallow any host key combination
* VBoxManage: added controlvm screenshotpng subcommand for saving the screenshot of a running VM in PNG format
* VBoxHeadless: fixed potential crash during shutdown (Windows hosts only)
* NAT: built-in services use the correct Ethernet addresses in Ethernet header and in ARP requests
* Host-only networking: fixed adapter reference counting
* E1000: fixed rare guest crashes with Linux SMP guests
* SATA: fixed guest disk corruption under rare circumstances (only relevant for guests with more than 2GB RAM;
* Storage: fixed data corruption after a snapshot was taken with asynchronous I/O enabled
* Floppy: several improvement
* HPET: another fix for time jumps
* USB: removed assumption that string descriptors are null-terminated (Windows hosts only)
* 3D support: fixed a potential crash when resizing the guest window
* 3D support: fixed GNOME 3 rendering under Ubuntu 11.04 and Fedora 15
* Snapshots: fixed another bug which could lose entries in the media registry when restoring a snapshot
* Shared Folders: don't stop mounting the other valid folders if one host folder is inaccessible
* Linux Additions: check whether gcc and make are installed before building kernel modules
* Solaris Additions: added support for X.Org Server 1.10
* Guest Additions: fixed inappropriate Guest Additions update notification when using vendor-specific version suffixes