I'm on Ubuntu 12.10, Core i5, Nvidia GTX 550 Ti, 8GB Ram and I have a problem.
Whenever I minimize a windows, the animation starts but the window in the animation has no contents, so basically, the contents of the window vanishes and the border of the window follows the animation.
Not only that but sometimes when unminimizing windows, the animations work fine, but the window contents will be black, and the only way to rectify is to minimize (animation works) and then unminimize again. After that the animation stops working properly again.
It's really bizarre and I can't figure it out. Any help would be appreciated.