When Berke goes to meet his parents at work, to tell them about the split with Allison, his parents are shown laid down on one another demonstrating better sex, when the camera comes back to them they are wearing different clothes and the chairs are laid out differently.
When the boys go to the club at the beginning of the movie, Felix walks over to his sister. He's wearing a long sleeve jacket over a black short sleeve shirt. When he takes he takes the drink from his sister, the arm grabbing the drink is a bare arm with a black shirt, but in the next shot, he's still wearing his jacket.
In the opening number of the show at the end of the film, Kelly's character Helena sings that she loves Burke's character Lysander, when in the original play, Midsummer Night's Dream, Helena loves Demitrius.
In the bench kissing scene, the editors decided to digitally remove the beer bottle from Kelly's hand. They didn't replace it with anything so it looks like she has a deformed claw for a hand when she walks to the bench and sits down. Later in the scene, the bottle is off to her left where there was no bottle before.