I get a similar issue with my Cablevision HD box. When connected directly to my new LCD, it works. If I insert the 990 in the chain, it fails and refuses to output video on the DVI port claiming my display is not HDCP compliant (which is false). So I'm temporarily forced to abandon the DVI switching of my 990 and go to component wiring.

I wonder what is involved to get the 990 to properly deal with being transparent from an HDCP standpoint?

Cheers,