OK FALSE ALERT!
I re-inserted (to see if there was an error message) the DVD in and I did see a message "Hi-resolution output is prohibited by disk blablabla" and then "480p selected". The **** thing caused my Oppo to re-configure itself for 480p, which is not enough bandwidth to pass hi-res PCM channels!

I re-configured it to 720p and then higher and everything is back to normal.

This is both pffff and grrrr.

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