I installed Beryl, but when I click on Beryl Manager in the Applications menu, the screen turns completely white except for the mouse cursor. When I move the scroll wheel on the mouse the corners of the screen flash black like the workspace switcher rotating. Other than that all I have is a white screen.
My video card (from lspci):
01:00.0 VGA compatible controller: nVidia Corporation NV44A [GeForce 6200] (rev a1)