Im running XP and Opera on my home coputer and Vista Ult. and Firefox on my laptop (usually at school) and ive never run into the problem. Im going to try using IE tomorow and see if that causes me any problems and if it does see if i can get my code-junkie friend to fix them.
PS: Opera is the best web browser ive used to date. (though it seems to hate vista, at least it did last time i ran it)