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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。VirtualBox 可以在 Linux 和 Windows 主机中运行，并支持在其中安装 Windows (NT 4.0、2000、XP、Server 2003、vista)、DOS/Windows 3.x、Linux (2.4 和 2.6)、OpenBSD 等系列的客户操作系统。假如你曾经有用过虚拟机软件的经历的话，相信使用 VirtualBox 不在话下。即便你是一个新手，也没有关系。VirtualBox 提供了详细的文档，可以助你在短期内入门。
VirtualBox 1.5.2 (released 2007-10-18)
Windows Installer: fixed installation on Windows 2000 hosts
Windows Installer: proper warning when installing a 32-bit VirtualBox version on 64-bit Windows and vice versa
Linux Installer: no longer require license acceptance during install, instead at first GUI startup (addresses issues with hanging installer on Debian based distributions)
GUI: added user registration dialog
GUI: fixed crashes on 64-bit Linux hosts
GUI: several fixes and improvements to seamless mode
GUI: fixed DirectDraw mode with certain video cards (e.g. Intel i915)
GUI: fixed incorrect guest resolution after leaving fullscreen mode
GUI: improved keyboard handling on Linux host
GUI: show fatal VM aborts (aka "Guru Meditation")
GUI: fixed crashes due to a display uPDAte race condition on some systems
GUI: added ACPI shutdown option to the VM close dialog
GUI: NLS improvements
BIOS: fixed floppy boot menu
BIOS: expose the VM UUID in the DMI/SMBIOS area
VGA: fixed CGA video modes
VGA: fixed 8-bit DAC handling (Solaris setup)
VMM: fixed issue with VT-x on Windows 64-bit hosts
VMM: improved compatibility with Linux KVM
VMM: fixed issues with Fedora 8 guests
VMM: fixed fatal errors while installing Windows guests when using AMD-V
VMM: fixed sporadic hangs when minimizing VM window and using VT-x/AMD-V
VMM: fixed high load of ksoftirq on tickless Linux hosts
VMM: fixed Windows 2000 guests hangs related to IRQ sharing
VMM: fixed sporadic errors during openSUSE 10.3 installation
VMM: fixed issue with Linux 2.6.23 guests
VMM: fixed issues with Solaris guests
VMM: fixed stability issue related to incorrect relocations
Serial: significantly reduced CPU utilization
Network: fixed issues with FreeBSD guests
Network: added MII support (100MBit detection fix)
Network: improved MAC address handling
Network: added PXE release logging
IDE: large reads from CD could exceed the I/O buffer size
Audio: load ALSA dynamically on Linux (i.e. do not fail when ALSA is not present)
VRDP: support additional RDP clients (SunRay, WinConnect, Mac OS X)
VRDP: fixed issues when client color depth is higher than server color depth
VRDP: make PAM authentication service name configurable
VRDP: increased stack size to deal with stack consuming PAM library calls
Additions: various fixes and enhancements to clipboard handling
Windows Additions: fixed issues with Additions on NT 4 guests
Windows Additions: added support for 8-bit video modes
Windows Additions: allow specifying custom resolutions for secondary screens
Windows Additions: several fixes and improvements for DirectDraw
Windows Additions: improved the mouse filter driver compatibility with other mouse drivers
Linux Additions: several fixes and enhancements to Shared Folders
Linux Additions: added support for X.org Server 1.4
Shared folders: fixed MS Powerpoint access issues (Linux host)
API: fixed RPC_E_CHANGED_MODE startup error on Windows hosts<
API: fixed SMP race condition on Linux hosts
API: fixed stability issues on Windows hosts in low memory conditions
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