i have the same problem:
i got a lot of email all the time
2008/02/17 18:44:36 :n

2008/02/17 18:44:56 :n

2008/02/17 18:44:56 :n

2008/02/17 18:44:36 kernel:check_cmd_sn(537) sequence error (1b6,1b7)
2008/02/17 18:42:37 kernel:check_cmd_sn(537) sequence error (1b5,1b7)