11c11,12
<         db_query('REPLACE {notify} (uid, status, node, teasers, comment) VALUES (%d, %d, %d, %d, %d)', $user->uid, $edit['status'], $edit['node'], $edit['teasers'], $edit['comment']);
---
>         db_query('DELETE FROM {notify} WHERE uid = %d', $user->uid);
>         db_query('INSERT INTO {notify} (uid, status, node, teasers, comment) VALUES (%d, %d, %d, %d, %d)', $user->uid, $edit['status'], $edit['node'], $edit['teasers'], $edit['comment']);