VirtualBox 4.1.2 Build 73507

What's new in this version:

The following items were fixed and/or added:
- 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