[Samba] problem with mapped group

[Dmitry Melekhov]

Hello!

We have samba 3.0.23d PDC and windows 2003 terminal server as samba 
domain member.
And we have mapped group with about 170 members.
We found that last added users (looks like last member of group) can't 
connect to windows server, i.e. they are not recognized by windows as 
group members.
How can we check that this is samba problem , not windows problem?