[Samba] 'Got user' is blank, can't authenticate

[dougs at urbitter.com]

Hello,

I have a working samba PDC with an old version of samba.  I'm moving  
this to a new server.  I've taken the old server off the net and  
rebooted all windows clients.  All further comments are related to the  
new server.

I'm running samba 3.10 with LDAP back end.

I can log into the linux console as test-user and the ldap/pam  
configuration works fine.

I can access the samba shares from a windows client as test-user, not  
logging into the domain, and all accesses work correctly on all shares

When I attempt to log into the windows client using the domain served  
by this samba pdc, I get no username in the log file, and I can't log  
into the domain.

[2007/07/31 07:04:21, 3] libsmb/ntlmssp.c:ntlmssp_server_auth(615)
   Got user=[] domain=[] workstation=[CREVASSE] len1=1 len2=0

and

   check_ntlm_password:  Checking password for unmapped user  
[]\[]@[CREVASSE] with the new password interface
[2007/07/31 07:04:21, 3] auth/auth.c:check_ntlm_password(222)
   check_ntlm_password:  mapped user is: [EFOS]\[]@[CREVASSE]

I figure I've missed something simple but I can't find anybody on the  
net with a blank username, thanks in advance.

doug