IE6 CSS – Page Jumps down

In IE6, this page works fine:

http://www.stmeyerandhubbard.com/forum/

But when you click on an article:

http://www.stmeyerandhubbard.com/forum/2008/02/trust-based-selling/

The top of the page (with the book and “Your Forum” heading) starts below the navigation. Any help would be much appreciated. I had a similar issue on other pages in this site, but they were remedied by removing anything <em> from the affected pages’ content… strange. This is running the “Ambiru 10” template.

Thanks,
-Nate