Tabs in IE7

Tabs in IE7


So here's one that's got me pretty baffled. I put together a rotating
tabbed interface for a client and things work beautiful in Firefox and
even pretty decent in IE6 (minor issue with tab width), but in IE7,
the tabs don't display inline, they get messed up and don't float left
like they should. The link below shows you what I'm talking about.
Any ideas why IE7 isn't behaving and where I should focus my efforts
to fix this? Much thanks!
http://www.caesarspoconoresorts.com/tabs.html
David