The link "User Groups" on the /usr/share/doc/HTML/index.html file (the
default page seen when you first start Netscape on Red Hat 7.) points to
the URL http://www.redhat.com/usergroups/.  When this link is clicked on,
the page you get at redhat.com is
http://www.redhat.com/apps/community/lug.html%23lug which doesn't exist.
You must remove the "%23lug" part to get it to work.

While I assume this is really a problem with the website, I'm reporting it
as a bug in indexhtml as it can be fixed there as well and I don't know
what implications modifying the webpage would have for other versions of
indexhtml on earlier releases of Red Hat Linux.