[@tbaleno Member 16 years, 8 months ago]

Well, having checked and rechecked everything, it turns out it was that the secret in wp-admin/options.php was different than the secret in the wp integration settings in bbpress.

I had checked these before and they were identical, but at the time I might have been dealing with a path issue. Then when the path issue was resolved I never went back to ensure they were still the same.

My suggestion to everyone is to check everything even if you KNOW you check them before.