Visible crew/equipment: When the group are finishing the recording of 'Tell Me if You Wanna Go Home' on the rooftop and Dan and Violet's guitar solos are finishing, the shot begins to pan out. Just before it reverts back to a close up, on the left hand side of the shot a crew member or piece of equipment slips into the shot (the shadow is also visible on the ground).
Continuity mistake: At the beginning of the film you can hear a kettle whistling. But when Alvin removes a teapot (not a kettle) from the heat the whistling stops, but when he puts in back on the heat about 5 seconds later there is no whistle. Alvin doesn't remove a whistle cap or turn off the heat. (00:02:30)
Factual error: The movie takes place in Carolina Beach, N.C. (east coast), and yet a number of times the protagonist, and others, sit on the beach and watch the sun setting over the ocean.
Deliberate mistake: The whole premise of the movie is 'artistic license' so to speak; the protagonist signs himself up to the bone marrow donors register, called ADMO in his country (Italy). But he is still a minor, and that is strictly not allowed. Not even with a written consent of the parents as shown in the movie.
Factual error: When the protagonist is looking up the fingerprint (or fingertip...) data in the computer, he gets a match for a New York State Driver license. The document is a clear fake, with no document number (which in 2008 was on the front) and a 10 digits client ID number instead of 9 digits. (00:04:00)
Revealing mistake: When Brooke arrives at the camp to drop off Steph and Chrissy, Chrissy leans out of the car and vomits, but you can see that she's not really vomiting, and is using her hand to cover up the special effects tube.
Continuity mistake: The layout of the two slices of pizza on the tray and the position of Tyler's fork on his plate differ after Matt reaches the table. The slices of pizza are touching, then spread apart like a "V." Tyler's fork moves from being diagonally across his plate with tines facing him to being situated near the edge of the plate with tines facing Jessica. (00:13:19)
Continuity mistake: Emily Smith-Dungy just kicked her bags in the snow. Her neighbour and schoolmate Kat drives by and offers her a ride home. Emily after initially rejecting her help accepts it; the trophy switches hands from the first quick shot to the next. Her scarf is also positioned differently. (00:08:40)
Factual error: There is a shot in the movie showing the outside front view of the Apple Head Office building. At the bottom of the screen it states the year (1981 or 1982). As the year is posted on the screen, a Chevy Cavalier drives into the shot in the foreground parking lot of the property. The Cavalier's style/shape and front headlights reflect that of a 1992-1994 model car - not a car from 1981 or 1982. (01:04:20)
Audio problem: In the mansion during the second scene, Louis is among the group and his phone goes off vibrating. It is extremely obvious that the sound of the phone vibrating was actually someone humming in attempt to mimic the sound, and doing a poor job at it.
Continuity mistake: The protagonist at the beginning of the movie sunbathes topless.The camera is positioned where the kid is spying her, and in that wide shot she is placing the garment she removed close to her lower half of the body. When he waves his hand casting a shadow over her eyes, the bikini top is in the corner of the towel next to her head. (00:01:20)
Audio problem: When the Police play "Roxanne" for Hilly, the actors are just lip-syncing to the studio version; though his laugh has been edited out, the atonal piano chord at the beginning of the song, a now-famous gaffe from when Sting accidentally sat on a keyboard during recording, still remains.
Continuity mistake: Towards the end while Ivan is getting arrested by the police, the sun changes between shots.
Revealing mistake: When Eliza is negotiating a deal to sell the pig to Magda whilst sitting at the kitchen table, Magda takes out her phone to call someone. When she puts the phone to her ear, a search bar and keypad can be seen instead of the call screen, revealing that she is not actually making a call. (00:28:30)
Continuity mistake: After stabbing the bad guy at the beginning, Callahan for some reason pulls back and somehow dives past a door managing to drag in a grown woman who was all crouched down by the entrance. Wonky physics of it aside, the bad guy shoot at him, but shoots just a hole in the door frame. The hole appears to be CGI, and in fact when Callahan shoots back from the bedroom, the hole is gone. (00:01:35)
Factual error: Near the beginning of the movie, the Slowhand album is on the turntable and the song "Lay Down Sally" is playing. The needle is near the end of the record, even though the song is the third of five tracks. Near the end of the movie, Meryl Streep drops the needle much closer to the beginning of the record to play the same song again.
Factual error: When Diana's father's surgeon shows Diana around the hospital, they end up in an operating room and they are both wearing street clothes. Problem is there are doors in every hospital where operations are performed and no-one is allowed past those doors without wearing scrubs, paper hats, booties and face masks, no matter who you are - they have to keep the operating rooms as clean as possible.
Continuity mistake: When the movie starts and Linda takes a glass of water to her lips, the hand with which she holds the glass swaps between shots.