Comment 235 for bug 99508

This thread: http://www.nvnews.net/vbulletin/showthread.php?t=104822 explains that a regression was introduced after 169.04 into the official nVidia drivers. Essentially, all drivers 169.07 and newer have this problem.

Also, according to this thread: http://www.nvnews.net/vbulletin/showthread.php?t=120829#13
nVidia is aware of the issue, a patch that was a partial fix made it into the release of Intrepid. All "working" work-arounds mentioned in these threads have made it into the final release of Intrepid as well, so it appears.

I'm going to post my AOL! (me too!) comment here as well. Even with the fixes mentioned in these threads, I am still having window border rendering issues and am now unable to downgrade to working nvidia drivers as they're not compatible with the version of xorg shipping in Intrepid.