In my experience, if the standards are followed, it displays properly in firefox 99% of the time and is botched in IE.
I'm a hand coder so I can't help with Dreamweaver much. All I remember about it is that it used to use some nonstandard tags that could cause problems
http://www.experts-exchange.com/Web_..._21652156.html
(scroll to the bottom)
If you post the source I'll tell you if I see anything obvious. What's the address?