Unity 3d Icons disappear after update

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http://askubuntu.com – After an update, the dock icons on unity 3d are gone. In 2d mode it's normal. Now I don't know what to do. I already tried replace and reset commands, remove and install unity but nothing works for me. Unity's bar is still there but there are no icons. I'm using Ubuntu 12.04 LTS (3.4.0.-030400-generic) How can I fix this issue? (HowTos)