Ticket #18975: 18975.4.patch

wp-admin/admin-ajax.php

@@ -860 +860 @@
                         'supplemental' => array('postid' => $pid)
                 ) );
         } else { // Update?
-                $var_by_ref = array_keys( $_POST['meta'] );
-                $mid = (int) array_pop( $var_by_ref );
+                $mid = (int) key( $_POST['meta'] );
                 $key = stripslashes( $_POST['meta'][$mid]['key'] );
                 $value = stripslashes( $_POST['meta'][$mid]['value'] );
                 if ( '' == trim($key) )