Oracle’s VirtualBox 4.0.10 is now available for download. This is just a maintenance release. VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use.
added support for X.Org Server 1.11.
fixed compiz under ubuntu 9.10.
fixed VM initialization if a shared folder does not exist.
fixed possible deadlock between hard disk enumeration and resetting of immutable disks.
fixed not detaching of virtual storage after a snapshot restore operation.
fixed clobbered CPU registers during stos/lods/ins/outs emulation under rare circumstances.
VirtualBox Homepage
