Marianne Vos was robbed. I don't know if the video is available online. On the Universal Sports channel, in the one slow-mo replay they showed, it seemed pretty clear to me that Vos was boxed in--she even had to stop pedaling while Bronzini was pulling away. If Vos hadn't gotten boxed in, she would have won. I can see why she was so upset afterward--2nd place 5 years in a row. Ouch.
On the other hand, Vos has blown away the competition in the UCI rankings for the season. So I'm not going to feel too sorry for her.