I purchased one of these at the weekend and have a few issues. (i) Picture is very bad (blocky) - only SKY news seems consistently good, other channels are only intermittently good. (ii) No EPG download. I can only see current & next program in the guide. (iii) The box seems to freeze occasionally requiring unplugging & replugging. I have come to the conclusion that the problem is due to the aerial. I got a brand new aerial installed on Saturday and the installer said that the signal was very bad in the area (too many trees). When I look at the signal strength it seems to hover around 50% and I sometimes get a warning that the signal is too corrupt. Would anyone happen to know whether these problems are symptomatic with a poor signal from the aerial?