I simply did not know what to do anymore trying to get Google Chrome working on Ubuntu 12.04. I tried many things and finally found that the problem was an incompatibility with the video card of my Sony Vaio!
The solution was simple:
$ google-chrome –blacklist-accelerated-compositing
Then I edited “/usr/bin/google-chrome” and added this argument 🙂
http://askubuntu.com/questions/167140/google-chrome-with-strange-behavior