Index: modules/system/system.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.module,v
retrieving revision 1.416
diff -u -F^f -r1.416 system.module
--- modules/system/system.module	29 Nov 2006 23:12:41 -0000	1.416
+++ modules/system/system.module	1 Dec 2006 03:31:05 -0000
@@ -2107,7 +2107,7 @@ function system_node_type($op, $info) {
  *   The form.
  */
 function confirm_form($form, $question, $path, $description = NULL, $yes = NULL, $no = NULL, $name = 'confirm') {
-  $description = ($description) ? $description : t('This action cannot be undone.');
+  $description = is_null($description) ? $description : t('This action cannot be undone.');
   drupal_set_title($question);
   $form['#attributes'] = array('class' => 'confirmation');
   $form['description'] = array('#value' => $description);