对于VMWare、Virtual PC这些虚拟机软件,可能大家都比较熟悉.VirtualBox是德国一家软件公司InnoTek 所开发的虚拟系统软件.
它不仅具有丰富的特色,而且性能也很优异.更是开源的,成为了一个发布在GPL许可之下的自由软件.新版变动如下：

    * USB 2.0 support
    * PulseAudio backend
    * GUI: fixed accelerators in German translation
    * GUI: fixed registration dialog crashes
    * GUI: allow to enter unicode characters to the name of the registration dialog
    * GUI: pre-select attached media in the disk manager when opened from the VM settings dialog
    * GUI: remember the last active VM
    * GUI: don’t accept empty paths for serial/parallel ports in XML
    * GUI: fixed NumLock / CapsLock synchronizazion on Windows hosts
    * GUI: don’t start the kernel timer if no VM is active (Linux host)
    * VMM: improved compatibility with FreeBSD guests
    * VMM: properly restore CR4 after leaving VT-x mode
    * VMM: patch code and disassembler updates
    * VMM: with VT-x a pending interrupt could be cleared behind our back
    * VMM: workaround for missed cpuid patch (some Linux guests refuse to boot on multi-core CPUs)
    * VMM: fixed code for overriding CPUID values
    * API: don’t crash when trying to create a VM with a duplicate name
    * API: don’t crash when trying to access the settings of a VM when some other VMs are not accessible
    * API: fixed several memory leaks
    * ATA/IDE: fixed SuSE 9.1 CD read installer regression
    * Floppy: fixed inverted write protect flag
    * USB: virtualize an EHCI controller
    * USB: several minor fixes
    * Network: fixed MAC address check
    * Network: host interface fixes for Solaris guests
    * Network: guest networking stopped completely after taking a snapshot
    * Network: don’t crash if a network card is enabled but not attached
    * PXE: fix for PXE-EC8 error on soft reboot
    * NAT: update the DNS server IP address on every DNS packet sent by the guest
    * VGA: reset VRAM access handers after a fullscreen update
    * VGA: don’t overwrite guest’s VRAM when displaying a blank screen
    * ACPI: implemented the sleep button event
    * VRDP: fixed crash when querying VRDP properties
    * VRDP: netAdress fixes
    * VRDP: fixed the Pause/Break keys over VRDP
    * VRDP: sync NumLock / CapsLock sync over VRDP
    * VRDP: workaround for scrambled icons with a guest video mode of 16bpp
    * VRDP: reset modifer keys on RDP_INPUT_SYNCHRONIZE
    * VRDP: reset RDP updates after resize to prevent obsolete updates
    * Clipboard: Windows host/guest fixes
    * Clipboard: fixed a SEGFAULT on VM exit (Linux host)
    * Clipboard: fixed a buffer overflow (Linux host)
    * Shared Folders: fixed memory leaks
    * Linux installer: remove the old kernel module before compiling a new one
    * Linux host: compatibility fixes with Linux 2.6.24
    * Linux host: script fixes for ArchLinux
    * Linux host: load correct HAL library to determine DVD/floppy (libhal.so.1 not libhal.so)
    * Linux host: make sure the tun kernel module is loaded before initializing static TAP interfaces
    * Windows additions: fixed hang during HGCM communication
    * Windows additions: fixed delay when shutting down the guest
    * Linux additions: added sendfile support to allow HTTP servers to send files on shared folders
    * Linux additions: make additions work with Fedora 8 (SELinux policy added)
    * Linux additions: sometimes ARGB pointers were display incorrectly
    * Linux additions: several small script fixes