Nope, I get no problems with IE4, nor with Opera at home. Try going to Tools > Internet Options > Advanced Tab > Uncheck "Display a notification about every java script error" (7th checkmark down). See if that helps at all.
That's exactly what's causing the JS error, is that pop up, once in a GREAT while on the other computer at work I'll get the error, but I disabled the alerts and now don't care lol ;)