samba - Aug 2009 - domain_client_validate error with Samba 3.2.13 on Debian Lenny

Hi, 

I have a big problem with Samba 3.2.13 on Debian Lenny. With Samba 3.0.x there
was no
problem:
"domain_client_validate: unable to validate password for user wolfgang in
domain
LIFEBOOKWR to Domain controller PDCALPI01. Error was 
NT_STATUS_NO_SUCH_USER."

Clients that are not a part of the domain cannot authenticate.

The DC is a Windows 2003 SBS server (PDCALPI01 with ip 192.168.1.1), and I'm
trying to
authenticate to a Samba server (3.2.13) with security = domain setting.

I have tried a downgrade to Samba 3.0.24, and there it works.

That is my smb.conf file:

[global]
   workgroup = alpi
   server string = lxarchiv
   wins server = 192.168.1.1
   dns proxy = no
   log file = /var/log/samba/log.%m
   max log size = 1000
   syslog = 0
   panic action = /usr/share/samba/panic-action %d
    security = domain
   encrypt passwords = true
   passdb backend = tdbsam
   obey pam restrictions = yes
   invalid users = root
   passwd program = /usr/bin/passwd %u
   passwd chat = *Enter\snew\sUNIX\spassword:* %n\n
*Retype\snew\sUNIX\spassword:*
%n\n *password\supdated\ssuccessfully* .
  add user script = /usr/sbin/adduser --quiet --disabled-password --gecos
"" %u --gid 1001
   printing = bsd
   printcap name = /etc/printcap
   socket options = TCP_NODELAY
   domain master = auto

TIA

Wolfgang