From time to time various web site display incorrectly - today it is Facebook [http://example.com http://www.facebook.com/home.php?ref=hp] but he other day it was my bank pages. Generally it corrects after re-strating the computer. Please advise how I stop this happening, or correct the problem when it occurs. I have checked simple things like latest display drivers, Java, Flash Player etc. The only add-on that is a show as a problem is Acrobat and that seems to be because I an running Acrobat Standard 9, and the latest update is for Acrobat Reader 10, but the same problem happens when I start Firefox in Safe mode.