Continuity mistake: During the scene when Ian is taped to the chair, the duct tape across his shoulders changes from shot to shot. Some times it touches the shoulder seams on his shirt, and other times it is several inches away.
Continuity mistake: After the spittoon cup gets spilled on Samir's shirt, the stain changes and becomes smaller in a later shot.
Continuity mistake: Aboard the stolen cab, the guys receive a photo from Jenna posing with the cardboard cutout of herself. She has a rather straightforward pose in the picture in the phone, while a moment later when we actually saw the picture taken she struck a pose cocking her torso and popping the hip out making a pouty face. (00:34:20)
Continuity mistake: When Frida is in her room and throws the stuffed animal near the window, she sees a zombie in the pouring rain across the street. However when her boyfriend startles her in the window, he is dry and the rain and wind instantly stopped.
Continuity mistake: An overhead shot shows Olivia squirting ketchup onto a pancake, nearly covering it. In the following shot, the amount of ketchup on the pancake has decreased.
Continuity mistake: The location of Mr. Ferguson's body on the rug (while he was apparently in a "mushroom stupor") changed a few times. He started with his head near the lefthand edge of the rug, but was about a yard toward the right edge when Nick was walking past him. A little later, Mr. Ferguson's feet were at the right edge of the rug, then about a foot beyond the rug, but his body was back to the middle with the next camera shift. (01:01:35 - 01:04:23)
Continuity mistake: When the main characters visit Montreal and with their friends they go out to eat at a diner and he creates a "home" out of 4 toothpicks, 3 sugar cubes and a coaster. As the camera goes back and forth in the conversation, watch the "home" on his plate of pancakes. It falls and appears to be scraped and turned in a different direction on his plate by the end of the conversation.
Continuity mistake: In the scene where Ryan and Alex are comparing travel cards, Alex's grip on Ryan's concierge card changes in close-ups.
Continuity mistake: After Paul tells Meryl that he was hesitant about adoption during their jogging, Meryl returns home. While jogging, she was wearing very tight grey pants. At the barn, her pants are a lot looser.
Continuity mistake: When Lotte is tied down to the altar and is talking to Jimmy, the cut on her face alters constantly from the left cheek and right cheek throughout the conversation.
Continuity mistake: When Mary first opens the phone book at the post office she lands on Finklestein but when she puts her finger on the name she chooses it as Hororwitz, even though she never turned the page again.
Continuity mistake: When Billy and Bolger are driving down the road after the funeral, they are on a 2-lane road, with nothing but grass and trees on either side. But when the shot changes so they're facing the camera, it's a 4-lane road with a lot more traffic. Then the road becomes much bigger with a median.
Continuity mistake: In a "movie inside the movie" moment, Arshad Warsi is on the witness stand. In the wide shot the hand he had on the book is held up gesticulating, and at the end of the shot he has his hat in both hands, while it is under his armpit in the shots from the front. (00:12:55)
Continuity mistake: When Joel and Dean sit at the booth to talk, Dean places two beers on the table such that the labels are facing the camera. As they talk and the camera switches back and forth between the two friends, Dean's beer switches orientation showing the label in some shots and not in others, despite the fact that he does not touch the bottle whatsoever. There isn't enough time between shots to allow him to move the bottle or drink any as the bottle remains full.
Continuity mistake: When the woman almost overturns the shelves when Wes is signing his book, you can see that in the first shot, all the upstanding books are falling down. In the next shot some are upright, and then in the next they are all lying down again. (00:18:00)
Continuity mistake: During the sex scene between Alex Pettyfer and April Pearson, April Pearson is not wearing a shirt. However, as Alex Pettyfer is dragged out of the car, she is suddenly wearing her shirt again.