I think the guy looked sparked out momentarily, the scuffle and then the french protestations all contributed. You can p'ss and moan about it, but nothing will change. I think its a crying shame for the likes of Shane Williamns. All the prep, all the hard work, it was all coming together....but at the end of the day, the refs decision is all part of the game and they have to play against that.
In any sport, I'm never too fussed about the result so long as there is a fair game and no dodgy decisions. It seems that rugby suffered one today, IMO, on what should have (and easily could have!) been one of the greates days for Welsh rugby in a very, very long time.