I am getting what seems to be random image or graphical corruption on some images. I first noticed this with a few favicons. Sometimes they would show corrupted, other times they would load properly. I also have now seen it on a webpage as shown in the attached image (percentage counter). The corruption seems to be of the same type, square with patterned lines of color. It seems to be some sort of rendering issue. The same page renders without corruption inside other browsers, so it is Firefox-specific. Any help much appreciated!