[chrishajer]

Adding this to the .htaccess in the forum root did it for me:

AddType x-mapp-php5 .php

Basically, you need PHP5 to prevent that redirect error. If your server has PHP5, then this will resolve the issue for you.

This problem was mentioned and resolved here before:

https://bbpress.org/forums/topic/354?replies=11#post-1748