[Samba] URGENT! Windows Server 2003 SP2 broke samba

[boxyzzy at netscape.net]

After applying SP2 to our Windows Server 2003 domain controller, we are 
unable to access Samba Version 3.0.4 shared user diectories. 
 
Access fails with these message: 
unable to validate password for user USER in domain DOMAIN to Domain 
controller \\DOODAH. Error was NT_STATUS_ACCESS_DENIED.

If no one has experienced and resolved this, how do I debug this 
situation?
 
Thanks, in advance, for any help offered. 
 
Charles 

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