[Windhamdavid]

Disable all plugins! upgrade the bbpress RC-1,

try again. if persist it sounds like your user tables are mangled probably due to something similar to dragunoff

https://bbpress.org/forums/topic/not-able-to-make-new-posts-database-error

you try to clean up using – http://lesterchan.net/portfolio/programming/php/#wp-dbmanager

.. are you sharing tables with your wordpress installation?