8600GT random garbage

This isn’t a critical issue, but after installing the latest NVIDIA drivers there are certain moments when the screen will display random garbage (from what I can tell it is random chunks of previously rendered images). This usually only happens right before the login screen comes up, and when switching between fullscreen mode while watching video.

Mobo: ASUS A8N5X
GPU: GeForce 8600GT
OS: openSUSE 11.1 x64 (KDE 4.1)
Monitor: Viewsonic VP930b @ 1280x1024
Drivers installed from the NVIDIA repository: download.nvidia.com/opensuse/11.1

Has anyone else experienced this? I realize this is probably an NVIDIA issue, but I wondered if anyone knew of a fix.

Its probably could be caused when during startx your system switching from "render" mode to openGL support and thats why when render is loading you see this garbage.