When I visit certain websites, using FireFox, my screen becomes very distorted. It doesn't do this every time, but there does seem to be a pattern in that the same sites will cause a distortion every other time I visit or maybe every third or forth time. There are several sites that can cause this problem. This site; http://www.usanetwork.com/, causes the distortion problem almost every time. I think there may be a correlation between sites with a patterned or gradient background as well. Thanks in advance. Kirk