I don't know if anyone else noticed on the night, but as soon as the penalty was awarded somebody in the Town End rushed down to the front row, immediately behind the goal, and presumably started filming on a mobile phone. The phone was letting out a bright light which was very noticeable, even from the York Street End, so I'm sure Newsham must have seen it as he was preparing and taking his run-up. I don't want to make excuses - it wasn't the firmest of penalties and I'm in the camp that says Miller should take them from now on - but I can see how the light from the phone would have been off-putting and I don't think the fan involved did us any favours on the night. Personally I'd prefer to have three points in the bag rather than being able to re-live a penalty miss on YouTube.
It's grainy, but if you freeze frame the match highlights at the point the penalty is being taken you can see what I mean. (I don't think the photo quite does justice to how bright the light was, but you can definitely see it was there).
At Telford over Christmas I know stewards stepped in and stopped Boston fans from filming / taking photos. I don't really agree with that and maybe it is a bit heavy handed, but when supporters are effectively shining lights directly behind a goal maybe there is a time for our stewards to step in?