I turned on logging, scanned again, and guess what - it worked. No idea why, as I'm sure it's nothing to do with logging, and nothing else was different this time. Anyway, I now have the guide back and TV working BUT, there's a new issue which wasn't there before - subtitles are appearing on every programme, and have to be turned off again every time I switch channels. When I left click on the screen and get the context menu up, the subtitles item shows a tick against the word 'off', and yet I have to click it to turn the subtitles off. It's very annoying having to turn subtitles off every time I want to watch something - is there a global setting for this somewhere, as I can't seem to find one?