Overlaps on the menu part on many of your pages (not all) using firefox. https://everquest.allakhazam.com/db/zone.html?mode=bymap as one example. Also overlaps on every item page that I clicked on.
A quick look at html is showing that it is not made with W3C standards. So pages only show up well in Ie I would assume. However since I do not use that virus attracting browser, I can not verify.