how to do a clean downgrade to 12.6?
OK - I shall try rolling back to 12.6
BTW if anyone is experiencing pixelating on channel change or fast forward/rewind (skips?) then try loading the latest dshowhelper and post if it helps. Default 1.3 beta always pixelated for 2-3 seconds for me but that new dshowhelper is nice and crisp.