No, I agree and I'm really only talking about offsides. In the same way whether the ball is hitting the wicket is too close to call in an LBW shout, so it stays with umpires call, I think it should be the same with offsides, because I refuse to accept that with the current system, they can accurately measure it to within millimetres, which is sometimes what they're trying to do. With penalties, fouls in the build up etc, the ref gets another look at it, so I suppose that's effectively still 'umpire's call' even if he changes his original decision.