Index: modules/user/user.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/user/user.module,v
retrieving revision 1.889
diff -r1.889 user.module
758c758
<           $authenticated_users = db_query('SELECT DISTINCT u.uid, u.name, s.timestamp FROM {users} u INNER JOIN {sessions} s ON u.uid = s.uid WHERE s.timestamp >= %d AND s.uid > 0 ORDER BY s.timestamp DESC', $interval);
---
>           $authenticated_users = db_query('SELECT u.uid, u.name, s.timestamp FROM {users} u INNER JOIN {sessions} s ON u.uid = s.uid WHERE s.timestamp >= %d AND s.uid > 0 ORDER BY s.timestamp DESC', $interval);
761a762
>           $listed_user_ids = array();
763c764,765
<             if ($max_users > 0) {
---
>             if ($max_users > 0 and !in_array($account->uid, $listed_user_ids)) {
>               $listed_user_ids[] = $account->uid;