I had a look at your page and it seems that you just need to adjust your widths and padding of all the elements involved. I altered the css from within Firebug to what I think is a more robust set of values. The resulting css should be more stable across all browsers. I've posted the resulting file here for you to look at: http://users.tpg.com.au/j_birch/clinicnine/clinicnine.css
I think you could just use this file instead of your current vertical.css file, however, note that I also included a rule to override the .main #sidebar1 width and padding to suit the new values for the rest of the nav. Hope this helps. Joel Birch.
