What do you mean by "they are in a long list"? Can you email me full info on this? Sounds like a quick fix, i'll help you out. Free of charge, you can buy yourself a beer on my behalf for those 2 bucks
vlad /at/ faxite /dot/ com
L.E.: You mean the menu items should be one below the other versus one next to the other? If so, add float: left; to main-navigation a.
L.E. 2: Rereading, you do want it horizontal, you can try adding display: inline-block; float: left; width: auto; Best to email me your site URL if you don't want it public and i'll email you back the exact solution.