Firefox table trouble... again

Hi all! Ok I have a tough one here… I have this table here in IE which shows perfectly but in Firefox (this must sound familiar for all you experts) - its a different story!

screwed up page

I already ran the page through the WC3 Validator and the only problem I get is that I am using <li> without previously stating <ul> and I have tried this anyway and it doesnt solve my problem and it just makes things look screwed up in IE as well…

Any suggestions? Shouldnt this be simple??

Thanks!

Ted