[Samba] Problem accessing shares after upgrade to 3.0.23

[Thorsten Hamester]

Hello list,
after upgrading my debian Sarge distribution with apt-get to 3.0.23
i have some troubles to access 3 shares on Windows 2000 and 2003 Server.
When trying to access them over smbclient i get the following error  
messages:

> :~# smbclient //ente/Axapta_Dokumente -U Administrator -d 2
added interface ip=192.168.100.121 bcast=192.168.100.255  
nmask=255.255.255.0
Password:
session setup failed: NT_STATUS_LOGON_FAILURE
> :~# smbclient //ente/Axapta_Dokumente -U Administrator -d 2
added interface ip=192.168.100.121 bcast=192.168.100.255  
nmask=255.255.255.0
Password:
Domain=[APE-BERLIN] OS=[Windows 5.0] Server=[Windows 2000 LAN Manager]
smb: \> ls
client_check_incoming_message: received message with mid 9 with no  
matching send record.
SMB Signature verification failed on incoming packet!
Server packet had invalid SMB signature! listing \*
Error in dskattr: Server packet had invalid SMB signature!

With kerberos authentication i get the same error.

My smb.conf lists a server signing = auto
All other signing are defaults.

So anyone has an idea how to fix this?
Thanks in advance

-- 
Thorsten
Systemadministrator