Index: wp-admin/includes/class-wp-themes-list-table.php
===================================================================
--- wp-admin/includes/class-wp-themes-list-table.php	(revision 23230)
+++ wp-admin/includes/class-wp-themes-list-table.php	(working copy)
@@ -25,7 +25,10 @@ class WP_Themes_List_Table extends WP_List_Table {
 	}
 
 	function prepare_items() {
-		$themes = wp_get_themes( array( 'allowed' => true ) );
+		if ( is_multisite() && is_super_admin() )
+			$themes = wp_get_themes();
+		else
+			$themes = wp_get_themes( array( 'allowed' => true ) );
 
 		if ( ! empty( $_REQUEST['s'] ) )
 			$this->search_terms = array_unique( array_filter( array_map( 'trim', explode( ',', strtolower( stripslashes( $_REQUEST['s'] ) ) ) ) ) );