Comment 4 for bug 576235

Someone on this thread is having the same problem, and they use ATI gfx card:
http://wwww.ubuntuforums.org/showthread.php?p=9345081

So I do not think we can assume this is a problem with the Nvidia driver. It does appear to be a problem with user permissions though. Why are user permissions getting screwed up?

Compaq Presario CQ60-215DX
Microprocessor 2.00 GHz AMD Athlon X2 QL-62 Dual-Core Processor
Microprocessor Cache 1MB L2 Cache
Memory 2048MB
Video Graphics NVIDIA GeForce 8200M