BuddyPress.org

I have added my own experiences to those of @dba2k10 in the thread above:

https://buddypress.org/community/groups/how-to-and-troubleshooting/forum/topic/bbpress-posting-errors-missing-database-tables/

Like the OP, I also found that none of the bb press tables were being created in my database. I was able to create them manually by using the MySQL statements in the default.bb-schema.php file. It’s not optimal, but it’s one fix. Hope this helps further the conversation.