VirtualBox 4.1.2.73507

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:

VMM: fixed 64-bit guests on AMD Fusion CPUs
VMM: fixed handling of the sysenter/sysexit machine instructions in 64-bit guests on Intel hosts
GUI: added linked clone support
GUI: fixed error check when changing the VM controller settings (4.1.0 regression)
GUI: fixed the inclusion of additional information (license, vendor, ...) on OVF export
GUI: when taking a snapshot from the VM selector, don't do a live snapshot
GUI: fixed immediate crash during start on certain environments due to a library version conflict
Guest control execution: implemented copying single files from guest to the host (directories and filters not supported yet)
Guest control execution: limited to serve up to 5 guest processes at a time by default
Main: return the correct RDP default port fixing settings warnings in the GUI if the remote display was enabled at runtime
VBoxSVC: made the path comparison OS independent when images are registered
VBoxSVC: several fixes/performance improvements for cloning of VMs
Snapshots: fixed "Solid-State drive" flag survival on snapshot creation
VBoxManage: implemented copyfrom and stat guest control tools to copy files from guest to host and to check for existence of files on the guest
VBoxManage: fixed extpack install --replace
VBoxManage: allow to start multiple VMs with startvm
VBoxManage: experimental support for SATA CD/DVD hotplugging
Mouse support: fixed an off-by-one pointer position error affecting Windows guests
VRDP: fixed a case when the screen was not redrawn correctly
NAT: changed TCP connection establishment according to Winsock API requirements (Windows hosts only)
USB: fixed device recognition issues and fixed several device capturing issues (Windows hosts)
USB: fixed issues with remote filters being applied to local USB devices
OVA: fixed import of renamed OVA files
Windows host: fixed icon for .VDI files
Solaris hosts: fixed a bug preventing parallel usage of multiple host NICs with Crossbow based bridged networking
Linux hosts: fixed random kernel panics on host suspend / shutdown (4.1.0 regression)
Guest Additions: keep logged in user count in out-of-memory situations and warn about it
Solaris Additions: fixed shared folders due to missing symbols in the vboxfs module (4.0.12 / 4.1.0 regression)
Windows Additions: fixed file truncation on a shared folder with some applications
Windows Additions: fixed shared folder issues with antivirus software and 64 bit Windows guests
Windows Vista and 7 guests: WDDM driver fixes and performance enhancements, fixed WinSAT crashes
Linux Additions: fixed llseek() for Linux kernels 2.6.37 and above