I am running 11.04. I have a Nvidia Geforce GT 240 with a dual monitor setup and am running the proprietary drivers. Each time I login, I get a weird problem. The left monitor has a corrupted background. It appears that the region where the app menu would reside is at a different zoom level than the rest of the screen. If I do anything to cause occlusion on that part of the screen the background redraws and everything looks OK. Has anyone else experienced this problem?