BrownPaper, I have the EXACT SAME problem that you describe, complete with the same Windows error message. It is clearly a problem with FireFox's interactions with Windows. I keep waiting for Mozilla to post a patch that fixes it, but nothing so far. BrownPaper and ptitterington, don't let these guys convince you that your problem is not real, or it's something that's your fault. It is a reproducible error with FireFox and the FireFox people need to address it. Half the people at my work who use FireFox have the same problem.