my steps:

login as: root
test@xx.xx.xx.xx's password: [valid password entered]
[logged in]
# exit

sshd log output:

Jun  4 12:03:12 sys sshd[1235]: Connection from MY.IP.AD.DR port 3894
Jun  4 12:03:15 sys sshd[1235]: Failed none for root from MY.IP.AD.DR port
3894 ssh2
Jun  4 12:03:17 sys sshd[1235]: Accepted password for root from MY.IP.AD.DR
port 3894 ssh2
Jun  4 12:03:19 sys sshd[1235]: Connection closed by MY.IP.AD.DR
Jun  4 12:03:19 sys sshd[1235]: Transferred: sent 3784, received 1928 bytes
Jun  4 12:03:19 sys sshd[1235]: Closing connection to MY.IP.AD.DR port 3894

I don't see any reason why i get "Failed none for root from" alert. I didn't
enter any wrong user/password.

OpenBSD 4.7-stable.