I had mine HD621 since Friday, spent few hours trying different options.

When connected before video processor(Crystalio II), all is good.

However when it was the last device in the chain before PJ, there were HDCP handshake drops all the time with black frames on the screen...

The last thing that bugs me is 5.1 96KHz audio from G98 over HDMI. No sound, just static...but CD on the same player passes without a glitch.