I have just installed the Channels app on my Shield and I must say, wish I had known about this app sooner, it beats the Google Live Channels app hands down. And actually makes watching TV on the Shield an enjoyable experience.
However there is one thing I can't work out how to do, when watching a channel and I press down the only guide available is Favourites guide, there seems to be no way to change this to All, HD or Categories. Is this possible?