13.04 & Firefox

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http://ubuntuforums.org – Last week I upgraded to 12.10 and had some minimal problems. This morning, I upgraded to 13.04 and it is turning into a disaster. When I try and open my browser (Firefox) the screen goes blue or has some strange distorted houndstooth pattern, and I have to shut down the computer and restart. Any idea what the problem is? Thank you. (Hardware)