Samba server stop working after upgrade

[Marc Olive <marc.olive@grupblau.com>]

Hello,

Our samba server stoped working fine after Lenny upgrade.
I can connect using "smbclient", but "smbtree" says:

"Server requested plaintext password but 'client plaintext auth' is disabled
anonymous failed session setup with NT_STATUS_INVALID_PARAMETER"

We can't access to samba server from MacOS finder, nor from nautilus or 
konqueror.

When upgrading, aptitude ask me to replace smb.conf and I say "no" as we have 
it configured with our shares.

Any idea? Thanks

-- 

Marc Olivé
Grup Blau