bbPress.org

BuddyPress is WPMU so it’s not an ‘all three’ but a ‘both’ (there’s no extra code to log in to buddyPress vs logging into WPMU).

It sounds like the cookies being set for bbPress are ‘wrong’. Double check the Auths and salts, even going so far as to RE paste them into the bb-config. If the SALT doesn’t match, the cookies will be wrong. And do make sure that you log out, flush all your cookies (go in and delete them) and dump your cache. FireFox hangs onto logins in weird ways sometimes, and IE is worse.

You may also want to check the BuddyPress post on the issue.

Copy these from wp-config:

define('AUTH_KEY',        'blahblah');

define('SECURE_AUTH_KEY', 'blahblah');

define('LOGGED_IN_KEY',   'blahblah');

define('NONCE_KEY',       'blahblah');

define('AUTH_SALT', 'bliddyblah');

define('LOGGED_IN_SALT', 'bliddyblah');

Put them in bb-config.php with BB_ in front:

define('BB_AUTH_KEY',        'blahblah');

define('BB_SECURE_AUTH_KEY', 'blahblah');

define('BB_LOGGED_IN_KEY',   'blahblah');

define('BB_NONCE_KEY',       'blahblah');

define('BB_AUTH_SALT', 'bliddyblah');

define('BB_LOGGED_IN_SALT', 'bliddyblah');