--- signup.module	2008-01-26 04:02:39.000000000 +0100
+++ signup.module	2008-03-19 12:47:50.639982100 +0100
@@ -1472,7 +1472,7 @@ function signup_node_admin_page($node) {
 
     // Build the row for this user.
     $rows[] = array(
-      $username .'<br />'. gmdate(variable_get('signup_date_string', 'M jS, g:i A'), $signed_up_user->signup_time + $offset),
+      $username .'<br />'. format_date($signed_up_user->signup_time, 'small', '', $offset),
       $signup_form_data,
       drupal_get_form('signup_user_cancel_form_'. $id, $id, $node->nid, $signed_up_user->uid, $signed_up_user->anon_mail)
     );