diff -u -p -r drupal\includes\bootstrap.inc drupal2\includes\bootstrap.inc
--- drupal\includes\bootstrap.inc	Mon Mar 12 21:46:12 2007
+++ drupal2\includes\bootstrap.inc	Mon Mar 12 21:51:59 2007
@@ -663,11 +663,6 @@ function drupal_set_message($message = N
       $_SESSION['messages'][$type] = array();
     }
 
+    foreach (module_implements('message_alter) as $module) {
+      $function = $module .'_message_alter';
+      $function($message);
+    }
+
     $_SESSION['messages'][$type][] = $message;
   }