I don't really see a problem. The only thing I see different on IE is the spacing between the tabs. There is a better way though. Use an unordered or ordered list instead and float the lis to the left. Your page is also malformed. You have no doctype, your title and css is inside of your body. You have no head tags which is where your css and title should be.
http://css.maxdesign.com.au/listutor...tal_master.htm Here is another good link
http://www.cssplay.co.uk/menus/pointer.html