Explorer.exe keeps crashing :-(

[HeWhoWas]

I have a Radeon 9250 using standard vista drivers, and every now and then (with increasing frequency) the screen goes nuts.

The taskbar image moves to the top of the screen, everything goes black except what the mouse is currently hovering over and the screen flickers like crazy, windows moving everywhere and flashing. Once I kill explorer.exe and restart it, it works fine, but this is the one crimp in my Vista experience. I'm loathe to uninstall it and go back to XP because I spent so much time tweaking and getting this to run properly...

Any ideas or comments are appreciated, and the ATI drivers don't support the 9250 range, before anyone suggests that :-(

Thanks,

HeWhoWas

Edit - Managed to get some screencaps...