Is this even possible for use in a fluid layout? I know the normal menu has issues with relative positioning and you need to place the main menu in a cell or div on its own, but obviously this is not possible with the List based menu.
I can only suggest you test it. I just tried with the sample included in the download. I put a div around the list menu and it seemed to work fine. Then I tried setting it as position='relative'; and that seemed to work also in IE and FF
