We had Sky HD installed on the 22nd of May. and last night we lost HD via the HDMI connector. Sky told us that there is an issue with Pioneer TV's that they are trying to resolve. More investigation has found that 100's if not 1000's of Sky HD customers have been affected. The fault usually occurs after 10 days to 2 weeks. In AV forums customers are complaining that they cannot use their Sky HD boxes. Sky blames Pioneer and vice versa. Reading through specialist AV forums it seems like other makes of TV are starting to show the same fault, Philips and Samsung were mentioned. It has also been reported on one forum that the HDMI output from the Sky HD box is causing damage to the HDMI chip in some media boxes connected to Plasma TV's. This appears to be a massive problem and Sky are trying to delay mass cancelations by asking HD users to stop using the HDMI cable and use the composite connections instead.