Ticket #15950: 15950.patch

wp-includes/canonical.php

@@ -403 +403 @@
         if ( get_query_var('day') )
                 $where .= $wpdb->prepare(" AND DAYOFMONTH(post_date) = %d", get_query_var('day'));
 
-        $post_id = $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE $where AND post_status = 'publish'");
+        $post_id = $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE $where AND post_status = 'publish' ORDER BY post_parent ASC");
         if ( !$post_id )
                 return false;
         return get_permalink($post_id);