Ticket #4051: 4051.patch

wp-includes/formatting.php

@@ -2004 +2004 @@
          * link starting with / or a php file).
          */
         if ( strpos($url, ':') === false &&
-                substr( $url, 0, 1 ) != '/' && !preg_match('/^[a-z0-9-]+?\.php/i', $url) )
+                substr( $url, 0, 1 ) != '/' && substr( $url, 0, 1 ) != '#' && !preg_match('/^[a-z0-9-]+?\.php/i', $url) )
                 $url = 'http://' . $url;
 
         // Replace ampersands and single quotes only when displaying.