Joomla + Firefox = No Menu's

[Mufasa1111]

I am working on redesigning my teams website http://robotics.southriverhigh.org/08/

I am using Joomla because we don't have time to code a completely new CMS before the deadline, and Joomla is user friendly. In hindsight durpal would probably work better, but I want to fix what we have first before trying new stuff. Inorder to reduce the number of tables that joomla spits out I changed the menu style to flat list, so that it gives the links in <li>'s. Problem is for some reason the menu's refuse to be used in firefox. After running the site though a validator I found a problem, Joomla sticks in an ID of mainlevel on each of the menus, and I think having multiple ID's is whats killing firefox. Any Suggestions for a work around on this? or would it be better to use tables for the menu this year, cutting my losses, while working on a spiffy tableless design for next year?


*edit*
Just for giggles I turned one of the menus into vertical *ie tables, and no ID's * so the problem is somewhere else. Anyone good at css willing to help me find it?
*edit 2*
I was not being clear, the menus are displaying in firefox, it is just that they are unable to be clicked on, or used.
*edit 3*

Problem was solved, although I still do not understand why it was tripping up firefox.