I think it's more what Chris said and the transmitter on the WDTV might be on the edge. I have a 6ft monoprice cable from the TV to the AVR, a 4ft from the BD to the AVR and they work fine. Only when I make a connection from the WDTV to the AVR is when I have a problem. It's not a bad batch neither a length problem since I bought several cable a different times and tried different lengths.

Bruno
M80s/VP180/QS8s/EP600/AVR-890
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"The problem is choice..."