Thanks guys, when on the EPG info it's crystal, as is the rest of the time I'm using the MMI it's just the actual channel picture that's iffy, it looks like it may be a processor issue then, I know only 1 of my aerials is working so I'll replace the antenna amplifier and see if it improves things, because it generally uses more than one aerial by what's written on the internet maybe that is causing problems as only one is working

wait and see I guess.
Edit: oh and mine has never been as crystal as yours Matt