There's a bit of a controversy about the Men's Shot Put event where Canada's Dylan Armstrong placed 4th, 1 centimetre out of a bronze medal.
If you watch this youtube video (which is really choppy, but I think still plants the seed of doubt), it looks like the judges mark the wrong spot when he makes his longest throw.
Judge for yourself I suppose.
http://www.youtube.com/watch?v=ut8FjSHve5g
TSN also has a story about it on their front page.