Comment 11 for bug 1004251

Achim: you appear to be using the "Ubuntu-X team" ppa (https://launchpad.net/~ubuntu-x-swat/+archive/x-updates), so you have the 2.19 version of the intel driver instead of the 2.17 that comes with precise. Also, you are using a newer kernel, with improved DRM code.

I, too, have this ppa enabled and I also found it improves the performance a bit. I guess that this bug is somehow related to the power of the graphics card used and the new driver improves things for Intel graphics. In fact, I recently installed precise in a SandyBridge laptop and the animations are smoother in that laptop than in mine (Ironhide-based).