Comment 2 for bug 569993

Today I installed Ubuntu 10.04 RC as a Virtualbox virtual machine. Hardware was quite different--namely a Nvidia Quadro 290 graphics card. The VM was configured with 3D acceleration enabled.
With the exact same GL-screensaver, I observed the exact same result: the password window is obscured by the (now "frozen") screensaver graphics.
I forgot to mention originally it does not matter if the screen saver is forced to start (ala gnome-screensaver-command --lock tied to a keyboard shortcut) or allowed to start after the defined 5 minute wait. Either way will provide the same result.