[Samba] Problem with Snow Leopard and Samba

[Clark Johnston]

We have a user who purchased a Mac Book Pro with OSX 10.6.2.
Everyday he has a problem with one or another Samba Server.  One day it's
FileShare1 , the next day it's ProductionData Server.
I use Windows and Linux and neither has  a problem connecting to these
servers.  He has XP in VMWare Fusion and that works fine.  But about every
other day he comes and says some server won't allow him to connect.
Sometimes a reboot will fix the problem.
We are using Samba PDC with LDAP backend and these are member servers he is
logging into.
Today he is getting an error that the login is incorrect on one Member
Server, yesterday he would log into a server and it would hang about 3 deep
into a directory tree and require reboot of the system.
Eventually that error just seemed to go away.
Anyone know of some glitch or issue with software on OSX 10.6.2?
I am not familiar with MACs  and didn't think that there would be an issue,
but thought someone out here may know of a quirk or something that would
cause this type of problem and how to resolve it.

Thanks,

P.S.  Are Snow Leopards an endangered species?  Do I need a license to shoot
a Mac Book  Pro? :)