Ticket #16639: 16639.diff

wp-includes/canonical.php

@@ -35 +35 @@
  *              not needed or the string of the URL
  */
 function redirect_canonical( $requested_url = null, $do_redirect = true ) {
-        global $wp_rewrite, $is_iis7, $wp_query, $wpdb;
+        global $wp_rewrite, $is_IIS, $wp_query, $wpdb;
 
-        if ( is_trackback() || is_search() || is_comments_popup() || is_admin() || !empty($_POST) || is_preview() || is_robots() || ( $is_iis7 && !iis7_supports_permalinks() ) )
+        if ( is_trackback() || is_search() || is_comments_popup() || is_admin() || !empty($_POST) || is_preview() || is_robots() || ( $is_IIS && !iis7_supports_permalinks() ) )
                 return;
 
         if ( !$requested_url ) {