VirtualBox-2.2.2 on openSUSE 11.1 ( Host ) : Windows XP ( Guest ) get stuck on 4 Bit Color in fullscreen condition

If u have trouble with VirtualBox-2.2.2 on openSUSE 11.1 ( Host ) that Windows XP ( Guest ) get stuck on 4 Bit Color in fullscreen condition.
This is the workaround :

1. Use VBoxManage, with parameter setextradata :
syahal@redarix:~> VBoxManage setextradata global GUI/MaxGuestResolution 800,600

2. Running VirtualBox with fullscreen.

3. Damn..!!!, it’s works…. hehehe..