Index: wp-admin/includes/template.php
===================================================================
--- wp-admin/includes/template.php	(revision 1317)
+++ wp-admin/includes/template.php	(working copy)
@@ -415,7 +415,7 @@
  * @param string $type The type of checked|selected we are doing.
  */
 function __checked_selected_helper( $helper, $current, $echo, $type) {
-	if ( $helper == $current)
+	if ( (string) $helper === (string) $current)
 		$result = " $type='$type'";
 	else
 		$result = '';