bbPress.org

The way subscriptions works has changed

use this code now :

add_filter ('bbp_before_get_user_subscribe_link_parse_args' , 'change_subscribe') ;

function change_subscribe ($args) {
	$post_id = $args['object_id']  ;
	if (bbp_is_topic( $post_id )) $text = 'topic' ;
	if (bbp_is_forum( $post_id )) $text = 'forum' ;
	$args['subscribe'] = 'Subscribe to this '.$text ;
	$args['unsubscribe'] = 'Unsubscribe' ;
return $args ;
}