American Wedding (2003) - 6 major mistakes
Directed by Jesse Dylan, starring Alyson Hannigan, Eugene Levy, Jason Biggs, Seann William Scott
Continuity: In the scene where Stifler has "fed" the ring to the dog he is waiting for the dog which swallowed it to go to the toilet to pass it through. When the dog has done this he takes the case from the chocolate cake he is eating to pick up the dogs 'business' and the cake is then lying face down on his plate in the next shot the cake is then the right way up again.