Comment 8 for bug 275308

I too fall victim to this. However, it only started occurring after I upgraded to Karmic (in advance of the official release). I think I was avoiding it because I had installed my own nividia drivers, and I switched to using ubuntu's during the upgrade? I'm not sure as I have been using twinview for years and not found this bug until now. So if this has been around awhile, one could try using older nvidia drivers, and/or dirvers not provided by ubuntu. If I figure it out, I'll post.