Hi Daniel,
Thank you for your message.
The V6 box was delivered the afternoon following my phone call to Virgin. Everything seems to be OK regarding the picture, but there are a couple of peculiarities. The first is the volume for ITV1 is quite low, and there are times when I need to turn the TV's volume to near maximum (other channels are OK). Also, subtitles on BBC3 and BBC4 recordings do not appear on playback. They appear OK on live TV and, as far as I can tell, this problem is only with these two channels. But the picture breaking up seems to have been remedied with this new box.