I got the same problem, what OS are you running?
I'm on Fedora myself and I started to see this behavior with the introduction of the 270.xx driver range. I tried Fedora 14 and Fedora 15, both had the same problem. Downgrading to older nVidia drivers solve the problem but I am now running the Nouveau drivers because the F15 kernel is too new for the 260.xx drivers. Else I would be using the proprietary drivers.
On a side note, I already sent an e-mail to firstname.lastname@example.org
(which I never received a reply on, by the way) with a screenshot and information as stated in http://www.nvnews.net/vbulletin/showthread.php?t=46678
 Wasn't reading too good, I see you're using Arch Linux.