Weird Model/Texture error

Today I got on CSS and I noticed that this http://screenshot.xfire.com/screenshot/natural/5d703c1e687a066cebad3f963ac9529e40f39ffe.png was happening. It also sometimes will do this on walls. It was doing the same thing on Assassins Creed earlier today also… Any suggestions to what it is/how to fix it?

Upgrade your drivers recently?