Warning: Missing argument 2 for wpdb::prepare(), after updating to 3.6

Hello all,

i’m having this error right after i updated to 3.6 version
Warning: Missing argument 2 for wpdb::prepare(), called in /home/gameblog/public_html/wp-content/plugins/category-icons/category_icons.php on line 1338 and defined in /home/gameblog/public_html/wp-includes/wp-db.php on line 992

here is lines from file category_icons.php:
$datas = $wpdb->get_results($wpdb->prepare("SELECT cat_id, priority, icon, small_icon FROM $wpdb->ig_caticons"));

and other part from wp-db.php :

function prepare( $query, $args ) {

Thank you for any help!