[Samba] Domain password server not available

[john.debella at teradyne.com]

We are running samba 3.0.7-1.3E.1in an AD domain which is running a PDC 
emulator. The samba servers are configured with "security = domain" and on 
some servers the password server is specified while on others we are using 
*.

We very frequently see the following messages in the log files of the 
servers.

"domain_client_validate: Domain password server not available"

Typically we can count on an smbd process to panic at the same time.

We've spoken to the admins of the PDC emulators and they claim that the 
servers are ok. 

Has anyone else seen this? Any ideas what would cause this?

-John