Comment 14 for bug 1073372

I'm glad I found this bug report. I was having exactly the same issue after I installed Ubuntu 12.10 (Had no such problem with 12.04). I had to reboot the machine every day or two as the UI was becoming very unresponsive and Xorg was using a lot of CPU.

I also confirm that installing the libcairo2 (and libpixman-1) from the 13.04 repository solves the problem. Thanks to the reporter for this workaround solution.