Error on 3.5 RC w/ membership plugin

This error with 3.5 RC
Warning: Missing argument 2 for wpdb::prepare(), called in /home/ssclub/public_html/wp-content/plugins/membership/membershipincludes/classes/class.adminbar.php on line 77 and defined in /home/ssclub/public_html/wp-includes/wp-db.php on line 990