I really appreciate you going through all that, Mark, and reporting it back here. I've been doing a LOT of reading on the subject, without finding any exactly relevant resources. I have, however, seen mention of a lot of unusual and intermittent problems with MacIE and Javascript, particularly in conjunction with CSS, which is our situation here.
I wish I'd gotten this feedback a couple of months ago, before I redid the entire site. All is not lost, though. Evidently Netscape and something called iCab perform very well in this situation (although we have a completely different situation with MacNS over in the Gallery). Plus, as I mentioned in reply to your email, there's an upgrade for the menubar due very soon.
All I can ask is patience, and don't stop visiting just because of some funkiness. In return, I'll keep on plugging until we get this fixed.
We can't have a Mac-unfriendly graphics site