Ticket #10805: 10805.2.diff

capabilities.php

@@ -966 +966 @@
  * @return bool
  */
 function current_user_can( $capability ) {
+        if ( is_numeric( $capability ) )
+                _deprecated_argument( __FUNCTION__, '2.0', __('Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead.') );
+
         $current_user = wp_get_current_user();
 
         if ( empty( $current_user ) )
@@ -987 +990 @@
  * @return bool
  */
 function author_can( $post, $capability ) {
+        if ( is_numeric( $capability ) )
+                _deprecated_argument( __FUNCTION__, '2.0', __('Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead.') );
+
         if ( !$post = get_post($post) )
                 return false;