Ticket #22258: 22258.1.diff

wp-includes/functions.php

@@ -902 +902 @@
 function wp_get_nocache_headers() {
         $headers = array(
                 'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',
-                'Last-Modified' => gmdate( 'D, d M Y H:i:s' ) . ' GMT',
+                'Last-Modified' => '',
                 'Cache-Control' => 'no-cache, must-revalidate, max-age=0',
                 'Pragma' => 'no-cache',
         );