BuddyPress.org

Ok, I don’t know if this helps, but when I had wpmu 2.7.1 and used bbpress-integration plugin, I had to add

define( 'COOKIEHASH', '####################' );

define( 'COOKIE_DOMAIN', '.yourdomain.org' );

define( 'SITECOOKIEPATH', '/' );

define( 'COOKIEPATH', '/' );

to the wp-config.php file and

define( 'WP_AUTH_COOKIE_VERSION', 1 );

to the bb-config.php file

After upgarding to wpmu 2.8.1, I read here that I had to delete the line I added to the bb-config.php file. Could that be the problem???