[Samba] Problems to join domain (clients XP send false SID !)

[manu Baylac]

Hi all.
First, sorry for my poor english.

I'm using samba on debian stable  as PDC with backend ldap on a small 
network.
Sometimes, and I don't know exactly when and why,  there's a problem  
when  clients XP3
joins domain (it blocks on next window just after login while receiving 
profile , sorry I don't know the message in english version),
and this, only on 2 physical machines.

The reason is in the logs :
When the logging succeed :

[2008/07/25 14:23:03, 5] auth/auth_util.c:debug_nt_user_token(454)
 NT user token of user S-1-5-21-1992849915-3986077062-2098313537-21044
 contains 8 SIDs
 SID[  0]: S-1-5-21-1992849915-3986077062-2098313537-21044
 SID[  1]: S-1-5-21-1992849915-3986077062-2098313537-513
 SID[  2]: S-1-1-0
 SID[  3]: S-1-5-2
 SID[  4]: S-1-5-11
 SID[  5]: S-1-5-21-1992849915-3986077062-2098313537-1003
 SID[  6]: S-1-22-2-513
 SID[  7]: S-1-22-2-10002

But when the loggin fails, i can see this with the same user :

[2008/07/25 14:26:44, 10] auth/auth_util.c:debug_nt_user_token(454)
 NT user token of user S-1-5-21-1992849915-3986077062-2098313537-501
 contains 4 SIDs
 SID[  0]: S-1-5-21-1992849915-3986077062-2098313537-501
 SID[  1]: S-1-1-0
 SID[  2]: S-1-5-2
 SID[  3]: S-1-5-32-546

My user is considered like guest !??!!

I've got only 1 server, and netbios and dns parameters seems good on 
clients.

These 2 machines are ACER notebooks installed with Acer CDs. Perhaps 
something with local strategies ?


Any ideas ?

Thanks,

            Manu