I'm getting this bug too, but I have an ATI Radeon HD 4300/4500 card. It's probably the latest update for drivers, but I can't seems to fix it by reinstalling an older Catalyst or drivers.
http://oi49.tinypic.com/155sxmr.jpg (221 kB)
http://oi45.tinypic.com/wv66hk.jpg (230 kB)