Netscape crashes with Javascript

I've tried all of the font path fixes and it doesn't help. Get an account
at intranets.com -- it's free. Next go to the "Group Documents" section and
create a few folders. Next try to expand/collapse these folders. After a
few expands/collapses, the browser will crash. This happens on other sites
as well. We have 6 copies of RH 6.1 running on new Dells as well as workers
offsite with various hardware that have the same problem. Looks like a
javascript bug. No problems on Windows (:?)).

I've also tried the fix on this page
http://members.ping.at/theofilu/netscape.html to no avail.

RH tech support said this was a known bug. What does this mean? I've not
seen any open bugs in bugzilla that address this problem.

Thanks in advance.