Revealing mistake: After Nicole has showered and she is getting out, you can see that she is wearing underwear as she is stepping out, to protect her modesty.
Continuity mistake: The first time they rehearse the scene with the dwarf, the bride and the dream. When the director is talking to the actors, they have a close up of the dwarf's head. The dwarf is tiny and in the close up of his face, he is facing forward. When they change to a long shot of them all, he is facing up. Why would the dwarf be facing forward anyway, when to get eye contact he would have to face up?
