Trust me Gonk. It's a real head scratcher! Spent a few hours pondering it - and a fitful night's sleep.

At least I'm now intimately familiar with almost every menu, sub-menu and sub-sub menu on both the BD60 and 886!

The real clue was the "FRONT (fixed)" that I noted below - which led me to try assigning the BD60's HDMI output to another 886 input.
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Jeff Mackwood