The following items were fixed and/or added since VirtualBox 4.0.12:
- VMM: fixed 64bit guests on AMD Fusion CPUs (bug #8824)
- VMM: fixed handling of the sysenter/sysexit machine instructions in 64-bit guests on Intel hosts
- 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 spurious LCtrl key events on some Windows hosts (4.0.6 regression; bug #373)
- VBoxManage: fixed extpack install --replace
- VRDP: fixed a rare screen corruption
- E1000: fixed rare Windows 7 guest hangs, either at boot time or when reconfiguring the network card in unusual setups (bug #6223)
- Mouse support: fixed an off-by-one pointer position error affecting Windows guests (bugs #7566, #9321)
- NAT: changed TCP connection establishment according to Winsock API requirements (Windows hosts only; bug #8919)
- VHD: fixed reads crossing block boundaries (bug #8532)
- VMDK: fixed progress indicator when creating split VMDK images
- Floppy: fixed medium size detection for physical mediums (Windows hosts only)
- VBoxSVC: made the path comparison OS independent when images are registered (bug #9303)
- Main: return the correct RDP default port fixing settings warnings in the GUI if the remote display was enabled at runtime (bug #9368)
- Main: fix VM initialization if a shared folder does not exist (bug #7941)
- Main: fixed taking screen shots (e.g. the preview window) for headless VMs if the Guest Additions are active
- Main: fixed possible deadlock between hard disk enumeration and the resetting of immutable disks (bug #9549)
- OVA: fixed import of renamed OVA files (bug #9033)
- Virtio-net: fixed the problem with UDP packets exceeding MTU (bug #9370)
- Solaris hosts: fixed starting EFI guests due to missing EFI ROM files (bug #9535)
- Mac OS X hosts: fix installation issues when installed as root (bug #1578)
- Windows Additions: fixed file truncation on a shared folder with some applications (bugs #9276, #9315)
- Linux Additions: suppress an incorrect error message and allow a shared folder to be mounted in multiple places (bug #9627)
- Linux Additions: add support for X.Org Server 1.11 (bug #9519)
- Linux Additions: fixed llseek for Linux kernels 2.6.37 and above
- Linux Additions: start VBoxService correclly on openSUSE 12.1 (bug #6229)
- Linux Additions: properly finish the installation even if the compilation of the DRM module fails (which is not fatal)