Does everything else work ok? To see if it's some sort of AJAX issue with the user, have him try to edit his profile and preview his signature and see if that works for him.
Rick, he gets the same error when previewing his sig, so sounds like an AJAX issue, yes? The next question is what to do about it. I know that AJAX is related to Javascript so could it be that he has an outdated JRE? Or some setting not set right in his Netscape? He is on an older MAC with Netscape 7 if that helps.
Basil
