[Tom Lynch]

If like me you have been struggling endlessly to integrate the two feeling like a dumb ass because you followed the video countless times and still could not get it you may have noticed that wordpress cookies are called ‘wordpress_’ where as bbpress integration creates cookies ‘wordpress_……’ this is the issue I had and spent and age trying to resolve, if you read this article to the letter ignoring the buddypress stuff it will 100% work.

http://umwblogs.org/wiki/index.php/Integrating_WPMu%2C_BuddyPress%2C_and_bbPress