Ticket #27498: correctly-identify-post-request-v2.patch

wp-includes/canonical.php

@@ -39 +39 @@
 function redirect_canonical( $requested_url = null, $do_redirect = true ) {
         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_IIS && !iis7_supports_permalinks() ) )
+        if ( is_trackback() || is_search() || is_comments_popup() || is_admin() || $_SERVER['REQUEST_METHOD'] !== 'GET' || is_preview() || is_robots() || ( $is_IIS && !iis7_supports_permalinks() ) )
                 return;
 
         if ( !$requested_url ) {