Index: wp-includes/script-loader.php
===================================================================
--- wp-includes/script-loader.php	(revision 3809)
+++ wp-includes/script-loader.php	(working copy)
@@ -185,6 +185,8 @@
  * @see WP_Scripts::print_scripts()
  */
 function wp_print_scripts( $handles = false ) {
+	if ( !$handles )
+		$handles = false;
 	do_action( 'wp_print_scripts' );
 
 	global $wp_scripts;