Index: wp-includes/update.php
===================================================================
--- wp-includes/update.php	(revision 18481)
+++ wp-includes/update.php	(working copy)
@@ -309,6 +309,7 @@
 	}
 
 	$counts['total'] = $counts['plugins'] + $counts['themes'] + $counts['wordpress'];
+	$counts = apply_filters('update_count', $counts);
 	$update_title = array();
 	if ( $counts['wordpress'] )
 		$update_title[] = sprintf(__('%d WordPress Update'), $counts['wordpress']);
@@ -318,7 +319,7 @@
 		$update_title[] = sprintf(_n('%d Theme Update', '%d Theme Updates', $counts['themes']), $counts['themes']);
 
 	$update_title = ! empty( $update_title ) ? esc_attr( implode( ', ', $update_title ) ) : '';
-	
+
 	return array( 'counts' => $counts, 'title' => $update_title );
 }