What video decoder do you have selected on the playback tab of the config app? Also, have you applied the 'no signal' patch from the '1.0.16 survival guide thread'?
I havent selected a video decoder sop it will be the default which I assume is the Software decoder. I will apply the patch although I see that this is for PVRX2 and I get this with both GBPVR and PVRX2.
Interestingly when the Channel Signal error comes up the The Signal Strength and quality bars shown are both at max
I'll try and get more info tonight. I will start a new thread with a more appropriate title with my findings