Seamless windows (see Sectionа4.7, “Seamless windows” )

Virtual serial ports (see Sectionа3.7.6, “Serial ports” )

Support for 64-bit Windows hosts (see Sectionа1.4, “Supported host operating systems” )

Intel PXE 2.1 network boot

Guest Additions for IBM OS/2 Warp

GUI: sometimes two mouse cursors were visible when Windows guest Additions became active

GUI: added VT-x/AMD-V settings

GUI: disable 'Show log...' menu entry to prevent crash if VM list is empty

GUI: the log window grabbed the keyboard

GUI: fixed error handling if Linux host clipboard initialization fails

GUI: pass the Pause key and the PrtScrn key to the guest (Linux hosts)

GUI: increased maximum guest RAM to 2 GB (Windows host)

GUI: improved rendering performance (Windows host)

GUI: status lights for USB and shared folders

GUI: properly respect the DISPLAY environment variable

GUI: download Guest Additions from virtualbox.org in case they are not present locally

VRDP: support for multimonitor configurations in Windows guests

VRDP: support for MS RDP6 and MS RDP Mac clients

VRDP: added support for WinConnect RDP client

VRDP: performance improvements

VRDP: fixed sporadic client disconnects

VBoxManage: never delete existing target during clonevdi

VBoxManage: properly print the size of currently used hard disks

VMM: fixed Xandros Desktop 4.1 hang

VMM: fixed VT-x/AMD-V hang with newer versions of gcc (Linux hosts)

VMM: improved stability of VT-x

VMM: check for disabled AMD-V when detecting support

VMM: fixed AMD-V issue when running OS/2 guests

VMM: fixed application startup regressions (e.g. VideoReDo)

VMM: fixed regression that broke disk access in OS/2 and OpenBSD guests (possibly much more)

VMM: fixed crashes if memory allocation failed (Linux)

VMM: fixed enabling of Local APIC on AMD hosts (fixed Ubuntu Feisty installation kernel hang during boot)

VMM: fixed XFree86 4.3 (Debian/Sarge) segfaults when switching to text mode

VMM: refuse to start when KVM is active (Linux Host)

VMM: fixed bootup hangs with ReactOS

VMM: fixed out-of-memory errors under certain environments with enough appropriate memory available

API: fixed occasional crashes of the VBoxSVC server during VM shutdown (Linux host)

API: some components were not notified when mounting a CD/DVD

VMDK: improve geometry compatibility with existing VDMK images

IDE/Floppy: optionally make non-available host device non-fatal

IDE: improve emulation accuracy of the IRQ line between master and slave drive

IDE: guest could freeze when unmounting the CD/DVD drive

VGA: several text mode fixes in particular with Windows DOS boxes

USB: fixed some issues with Windows hosts

USB: fixed race condition between udev and USB filters (Linux host)

Shared Folders: reversed network provider order to increase mapping performance (Windows guest)

Shared Folders: browsable from Windows Explorer (Windows guests)

Shared Folders: stability fixes (Windows guest)

Shared Folders: case sensitivity fixes (Windows guest and Linux host)

Audio: fall back to the NULL audio driver if no voice could be opened

NAT: fixed crash

Guest Additions: reworked the shared clipboard for Linux hosts and guests based on user feedback about problems with individual applications

Guest Additions: don't allow to disable mouse pointer integration for Linux guests as an Xorg hardware mouse cursor cannot be turned into a software mouse cursor

Guest Additions: Linux guests shipping Xorg 1.3 (e.g. Fedora 7, Ubuntu Gutsy) are now supported

Guest Additions: added DirectDraw support to the Windows display driver