I'm not quite sure WHY I was getting this redirect loop error. It was working okay for a while until I maybe got a little crazy entering all my rules. Then when a user tried to log in I would get this error:
Redirect Loop
Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
The browser has stopped trying to retrieve the requested item. The site is redirecting the request in a way that will never complete.
* Have you disabled or blocked cookies required by this site?
* NOTE: If accepting the site's cookies does not resolve the problem, it is likely a server configuration issue and not your computer.
--------------------------
I'm using sh404SEF. I went in and turned off all redirect logic for both CB and C-ACL. That didn't help so I added this custom redirect:
index.php?option=com_community_acl&lang=en&task=redirect to just: index.php
That was after I tried removing and then changing the redirect URL in your config (couldn't find any documentation on it).
It's working for the moment, although I felt like it was brute force.
And now I'm really antsy about having old Joomla core files hacked on 1.5.10.