Take it easy on me I'm a newbie! 8)
Reinatlled PunBB again (like the 6th time, LOL), logged in as admin.
Then I clicked on 'admin', clicked on 'show info' next to PHP (is this the page you wanted me to check?). Did a quick search for _SERVER["HTTP_REFERER"] but nothing poped up. So I manually searched the phpinfo() page and still didn't find it. So next I looked for 'admin_index.php' on the page and found a reference to 'admin_index.php' under Apache Environment and PHP Variables but nothing about HTTP_REFERER. Couldn't find any reference to base_url either. I looked under the PHP Variables and found my IP listed in many places on there but there wasn't a _SERVER["HTTP_REFERER"] anywhere on that page.
I then backed out and went to admin>options>base url and its the same I entered at install:
http://00.000.000.00/bbs (my real static IP instead of zeros ofcourse) and even when I install PunBB as just localhost while offline I still get the same bad http_referer.
When I try any of the admin options (Categories, Forums, Users, Options, Permissions, Censoring, Ranks, Bans, Prune, Maintenance, Reports) I still get the same bad http_referer message.
Oh and and this 6th reinstall I had a 'Guest' user that registered on 1969-12-31! ROFL! And it has my admin name registered twice. I'm totally confused about all this. Sigh. 8(