bbPress.org

This issue has been reported before with deep integrated sites. Every page of the forum will return a 404, I believe, but depending on the browser, you sometimes see the content instead of the errors. Here are the headers returned from your forum:

Response Headers - http://www.johnthebaptisttv.com/bbpress/



Date: Fri, 30 Apr 2010 15:20:41 GMT

Server: Apache/2.2.13 (Unix) mod_ssl/2.2.13 OpenSSL/0.9.8e-fips-rhel5 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635

X-Powered-By: PHP/5.2.11

X-Pingback: http://www.johnthebaptisttv.com/xmlrpc.php

Expires: Wed, 11 Jan 1984 05:00:00 GMT

Cache-Control: no-cache, must-revalidate, max-age=0

Pragma: no-cache

Last-Modified: Fri, 30 Apr 2010 15:20:41 GMT

Connection: close

Transfer-Encoding: chunked

Content-Type: text/html; charset=UTF-8



404 Not Found

http://www.themelab.com/2008/04/17/is-your-bbpress-installation-returning-404-errors/

https://bbpress.org/forums/topic/bbpress-wordpress-mu-or-not-leads-to-404-errors-but-pages-still-load#post-13156

I also think a simple solution was to include wp-load.php instead of wp-blog-header.php. Which one are you including now?