[Samba] Can't log in, but logs say auth succeeded?

[Ben Davis]

I've just gotten my first machine to join the domain, and now I'm trying 
to log in as a normal user.  I get this error in windows "The system 
could not log you on. Make sure your username and password are correct 
(bla bla...)".  However, when I check the log for that machine it says 
at the end that authentication succeeded?

/var/log/samba/log.melisa:  (log level=2, debug timestamp=no)

netsec_decode: FAILED: packet sequence number:
[000] 7D AD 7D F4 29 CE 7C D4                           }.}.).|.
should be:
[000] 00 00 00 00 80 00 00 00                           ........
smbldap_open_connection: connection opened
init_sam_from_ldap: Entry found for user: melisa$
init_sam_from_ldap: Entry found for user: bdavis
init_group_from_ldap: Entry found for group: 512
init_group_from_ldap: Entry found for group: 0
init_group_from_ldap: Entry found for group: 100
check_ntlm_password:  authentication for user [bdavis] -> [bdavis] -> 
[bdavis] succeeded