Mod_rewite behaving differently under Revision 1.3.4

[T_Rex]

After our webhosting service updated the revision to 1.3.4, my website came down with the htaccess file present. I had to temporarily cut htaccess back to "bare-bones" and then did some hacking to find what the problem was. I ended up moving all referrer bans from mod_access over to mod_rewrite conditions like this:

SetEnvIf referer .*\forum.* ban
Converted to this:
RewriteCond %{HTTP_REFERER} forum [OR]

That made the website come back up last November, and now I see that people are entering the site from forums again.
Rewriting one REFERER group with a
RewriteRule ^.*$ [sendumhere.com...] [R=301,L]
and rewriting a REFERER like this
RewriteRule .* - [F]
No longer work!
Odd isn’t it?
Well at least my spider trap still works.

[T_Rex]

Bump
Is there a way to mod_rewite with condition based on REFERER anymore?
I need to do this with the new version.
Thanks for any ideas

[sitz]

Yes. There are NUMEROUS examples of this in the archives.

[jdMorgan]

Here are some examples [webmasterworld.com] (and you can follow the link in the first post back to previous threads).

Note also that the last RewriteCond before the RewriteRule *must not* have an [OR] flag.

Jim