--- includes/common.inc.orig	2008-11-08 21:09:09.000000000 +0100
+++ includes/common.inc	2008-11-11 16:02:18.000000000 +0100
@@ -1438,6 +1438,8 @@
  *   an HTML string containing a link to the given path.
  */
 function l($text, $path, $options = array()) {
+  global $language;
+
   // Merge in defaults.
   $options += array(
       'attributes' => array(),
@@ -1445,7 +1447,8 @@
     );
 
   // Append active class.
-  if ($path == $_GET['q'] || ($path == '<front>' && drupal_is_front_page())) {
+  if (($path == $_GET['q'] || ($path == '<front>' && drupal_is_front_page())) &&
+      (empty($options['language']) || $options['language']->language == $language->language)) {
     if (isset($options['attributes']['class'])) {
       $options['attributes']['class'] .= ' active';
     }