Originally Posted by Wise Ferret
Upon further investigation it seems that the cause for these issues are incompatibilites between the nvidia driver and the latest 1.9 series of libcairo2.
Personally, I'd guess that it's the same Composite/X sync problem that's been there from the start. The 1.9 snapshots are slower than the 1.8 versions, so Compiz is now probably picking up the window contents before they're fully drawn.
Try enabling the "Workarounds" extension in Compiz, and make sure the "Force synchronization between X and GLX" option is checked. Or just try disabling Compiz.