Sound Output reverts to Internal Speakers every time I log in

Hello all,
I have a Mac Pro 2,1 and just installed update 10.6.2 and every time I restart or power it up, it will revert sound from Digital Out to Internal Speakers.
Later I created a new account, logged out and logged back in and sound was also reverted to internal speakers.
I have another internal hard drive with 10.6.1 and don't have this issue.
Does anyone know how I can submit a bug-report to Apple?
Thanks,

See this thread for some things to try:
http://discussions.apple.com/message.jspa?messageID=10141072#10141072

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