If someone could tell me how to fix this..

I would be very grateful.

I’ve been venturing into the world of web design.. well actually customizing themes and templates and installing things for other folks (although I noticed today that there is a new version of WordPress that my host doesn’t support.. crap)

So anyway. this is my problem.. this site looks AWESOME in IE (I think) but the header is all FUBAR in FireFox. Is there some quick way to fix this?