Firefox verses IE

Did I ever mention I detest Microsoft products? I'm a big fan of Firefox - I was using Netscape before most people knew what it was. So should I post a notice on my site that it's only Firefox friendly? Sure thing and I call myself a web developer? Yeah, right. So I'm back to the drawing board to figure out what the incompatiblity is with the layout of the new blog. But is sure does look pretty in Firefox.