The following section describes some issues that are known not to work in VirtualBox 2.0.6. Some of these issues will be fixed in later releases.
NAT mode. A virtual network adapter configured for NAT is slower than an adapter configured for host interface networking.
Vista 64 bits host :
Known stability issues when using USB
Mac OS X host. The following restrictions apply (all of which will be resolved in future versions):
No support for audio input
No support for VT-x/AMD-V (required for 64-bit guests)
The numlock emulation isn't implemented yet
No support for connecting a virtual serial port to a physical serial port on the host (experimental support added since version 2.0.2)
No ACPI information (battery status, power source) is reported to the guest
The CPU frequency metric is not supported
Solaris hosts. The following restrictions apply (all of which will be resolved in future versions):
No support for audio input
No support for using USB devices on the host
No support for connecting a virtual serial port to a physical serial port on the host
No ACPI information (battery status, power source) is reported to the guest
Guest Additions for Solaris. The following restrictions apply (all of which will be resolved in future versions):
Shared folders are not yet supported with Solaris guests
Switching a Solaris guest from 64-bit mode to 32-bit mode or
vice versa when Guest Additions are installed would fail to start the
X11 graphical interface on the guest. The current workaround for
this is to simply login via the console and delete the file
/etc/x11/xorg.conf and to
proceed to install the Guest Additions for the newly booted mode.
This will be fixed in a future release of VirtualBox.
Guest Additions for OS/2. Shared folders are not yet supported with OS/2 guests yet. In addition, seamless windows and automatic guest resizing will probably never be implemented due to inherent limitations of the OS/2 graphics system.