I'm using the latest mediaportal tv engine 0.3 and have 2 nebula digitv usb slave units using the latest BDA drivers. Via this method I appear to get very choppy signal on the five/e4 mux (crystal palace) and possibly on some others (itv mux seems variable). If I use my master usb unit with the normal digitv software though everything is fine, signal and snr is well into the green on every single mux and I can even watch BBC HD. I can also view TV no problem on my 2 freeview equipped TVs. What do people think is the problem here, the mediaportal tv engine or the BDA drivers?