For all people using an HD box from sky, you may be interested in a problem I have identified. I found that there was no audio on Channel4 HD. I contacted Sky and an engineer came today. He could not explain the reason, no other HD channels were affected. So, he assumed it must be a fault with the box, and so replaced it. After he had gone, I got an error message to say there was a fault with my viewing card. So, rang them again, with great visual-impairment difficulty,I followed her instructions to remove and replace the card! I re-set my settings, including audio description. Guess what, on going to Channel4 HD again, no audio again! Phoned them yet again, I was a very unhappy and stressed bunny, and thanks to my original report, they agreed that this was a fault which they were previously unaware of! I found when I switched off audio description, yes, I got audio back on Channel4 HD! What a performance! Yes, they thanked me for bringing this to their attention, but there was no compensation for the stress or cost of the many phone calls I had had to make! Reluctantly, finally, she agreed to reduce my next bill by £5! I had suggested £20! I await information on how they proceed with the fault! Thought I ought to let others know! Cheers, off to watch HD apart from Channel 4! Maggie