Not a big deal, but thought I'd ask anyway to see if anyone has any ideas:
Sometimes when we turn on our TV in the morning, there is no sound. It doesn't come back until we turn the box off and on again (standby does the trick, no need for a full reboot)
It seems to happen if the box has tried to record something on a channel that we are no longer subscribed to as the channel is always on a non-subscribed channel. We though we'd killed off the old series links, but apparently not.
It's not a big deal, just marginally annoying when our little one wants to watch her cartoons at 5.30 in the morning! She doesn't quite understand the concept of patience just yet...