It is broken in my Firefox 2.0.0.6 -- the bottom lines of the Facts menu over-write the top of the following (blue) text. It should render correctly in all Browsers.
I've got FF too, just tested it and it looks broken... Either that or a horrible design... But probably broken...
Same problem in MSIE 7.0. Also, you have Markup validation errors - recommend you use a Strict Doctype and re-validate.
I'd reconsider the design - it's very 1999 to me and I'm sure if you talk to some of the designers here you could get a unique design that's much more up to date for very little outlay.