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73416ba
(Get the code!)
It still is not fixed in Ubuntu 12.04.2 on March 19, 2013.
However my understanding is, that it affects only 64-bit editions, using Compiz (3D accelerated) Unity.
For me checking off of hardware acceleration did't work, but I found that awkward workaround for this is logging into 2D session (click on Ubuntu logo in login screen and select Unity 2D).