Anyone got a clue what is happening here: Recently I stopped hearing sound through my cinema system on BBC HD during live or recorded programmes; it works fine during the station promo (the fancy flying logo bit) and it works when listened to through a normal telly in the second room. All other HD channels are fine. I was able to get sound back by turning off Dolby Digital in the Optical Out menu on the Sky box; however presumably this will give me poorer sound. Output from the Sky box goes into a Meridian G68 processor and then on to a set of Meridian DSP 5500s. Is the BBC sending some strange sort of signal which breaks my processor's decoding?