I've got a site going at http://www.unmartmuseum.org using a theme I purchased from Template Monster. I've been developing in Chrome and everything is fine, everything also appears basically as it should in Safari.
Firefox and Internet Explorer however seem to be having major css issues with my pages. It basically looks like no styling is being applied whatsoever, although a few basic color rules are being read correctly. I had been checking the site in Firefox the past few weeks and while it wasn't rendering perfectly, it certainly wasn't as broken as this.
I've never seen a cross-browser disparity this great, anyone with any ideas as to why Mozilla and IE would be doing this while Chrome and Safari look fine would be greatly appreciated.