domain_client_validate: credentials failed (\\.)

[Johan Hedin]

Using TNG 2.5.3 and the newest CVS (update today), I get

domain_client_validate: credentials failed (\\.)
SMB LM/NT Password did not match!

while trying to log in from NT4SP6. smbclient from the same source works.
Using an older version of TNG works fine (sorry don't remeber the date its
from, but after the change to sbin). Has something changed so I need to do
some reconfiguration of my smbd.conf or smbpasswd? All running on Solaris
2.6.

TIA

Johan Hedin