Re: Integrated registrations
You need to remove the integration plugins for a start. They are not required with WP2.5/bbPress0.9
The role manager plugin in WP may be hampering things too.
In fact, you should turn off all your plugins on both WP and bbPress and see how it goes.
The only other potential for a bug is if you have a non standard WordPress table prefix (i.e. not “wp_”)