This checklist was gold. Thanks.
I’m actually using an older version of WordPress (integrating wordpress 2.3.1 + aMember + bbPress). aMember doesn’t yet work with wP2.5. Had to follow bbPress instructions for older installs of WP.
After that, and confirming against your checklist, everything worked.
I’m having the same issue… just wanted to provide some company. Will post if I resolve.