This rings a bell -- alas Moshe reported a similar issue. To date, we haven't been able to reproduce nor fix it. From what I have been told, it is specific to IE <some-version>. More details or investigation would be appreciated.
I have faced it with Firefox 1.0. The problem goes when you point to any other url, for example /glossary, then back to the homepage and it loads perfectly.
Regards maykel