[Samba] joining the domain failes with 3.2.3

[Helmut Hullen]

Hallo, samba,

when I run Samba 3.0.32 on my Linux server (security = user) then I can  
join a Windows 2000 client to the server, the users on the client can  
connect to the domain.

When I update from 3.0.32 to 3.2.3 (the last "official" slackware  
package) the client cannot more connect to the server; the client shows  
an error message that the profile directory on the server cannot be  
found.

Client messages: Window "Benutzerumgebung"
first message: "Das Profilverzeichnis  
"\\arktur\Profile\<user>\Win2k.pds" konnte nicht erstellt werden. Sie  
werden nur mit Ihrem lokalen Profil angemeldet. ..."
second message: "Das lokal Benutzerprofil wurde nicht gefunden. Sie  
werden mit einem temporären Benutzerprofil angemeldet. ..."

The directories "/home/Profile" and "/home/Profile/<user>" and "/home/ 
Profile/<user>/Win2K" were created with 0700. When I change the rights  
to 0777, the directory ".../<user>/Win2K" is filled with data. But the  
error messages leaves unchanged.

Server messages (debug level 1):
(Client think82)

think82.log:
[2008/10/02 15:10:29,  0] lib/util_sock.c:write_data(1059)
[2008/10/02 15:10:29,  0] lib/util_sock.c:get_peer_addr_internal(1596)
  getpeername failed. Error was Transport endpoint is not connected
  write_data: write failure in writing to client 0.0.0.0. Error Connection reset by peer
[2008/10/02 15:10:29,  0] smbd/process.c:srv_send_smb(74)
  Error writing 4 bytes to client. -1. (Transport endpoint is not connected)

192.168.0.42.log
[2008/10/02 15:10:29,  0] lib/util_sock.c:get_peer_name(1790)
  Matchname failed on Client-A42.wm8.hullen.de 192.168.0.42

(but that message seems to appear also with Samba 3.0.32)

Where can I search for the error?

Viele Gruesse!
Helmut