Index: modules/user.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/user.module,v
retrieving revision 1.561
diff -u -r1.561 user.module
--- modules/user.module	17 Jan 2006 09:04:20 -0000	1.561
+++ modules/user.module	18 Jan 2006 19:32:15 -0000
@@ -646,10 +646,12 @@
  * @ingroup themeable
  */
 function theme_user_list($users, $title = NULL) {
-  foreach ($users as $user) {
-    $items[] = theme('username', $user);
+  if (!empty($users)) {
+    foreach ($users as $user) {
+      $items[] = theme('username', $user);
+    }
+    return theme('item_list', $items, $title);
   }
-  return theme('item_list', $items, $title);
 }
 
 /**