Continuity mistake: Radha Mitchell is giving a press release at the beginning of the movie. There are many microphones in front of her in rows. In the front row, from her left, are orange, black and blue microphones. In one shot from the front, another black microphone appears next to the blue one. (00:03:35)
Continuity mistake: When Santana is going to open the bloody written locker, he takes the key off his neck, but when he puts the key in the keyhole, it's around his neck again. Some moments later, when he is talking with Johns, the key is off his neck again.
Continuity mistake: When Ivan invites Richie onto his yacht for the first time, a jet ski pulls into Ivan's close-up, and disappears after it cuts back.
Continuity mistake: Near the beginning of the film, Llewyn goes into a subway station. The train that comes in is a different car model than the one he is sitting in in the next shot. Also, the exterior shot is of a train that did not yet exist in 1961. That model was introduced around 5-6 years later.
Continuity mistake: At the end the guy is watching the video of the man that shoots himself in the chin, blood and bone go everywhere, then it shows the guy and girl walk in but there's absolutely no blood. They would have definitely noticed it.
Continuity mistake: Bera and Bea have multiple sequences where he complains about his roomie Ugo who lashed back at him after all the abuse he had to take from him. There's a plastic cup on the flush tank; in one of the scenes, in between others, the cup is suddenly in a different spot on the tank (more to the right) and the straw is tilted the opposite way than before. (01:11:00)
Continuity mistake: At the beginning of the film when the girl is shot, in the close up there is no debris on her face, but the next wider shot shows her face covered with dirt and other bits of debris.
Continuity mistake: Michelle Pfeiffer's costume. First we see her toes being painted, drying with tissue between each of her toes. She gets up from the chair to take the peppers out of the oven, talking to Fred about being a writer. She then goes out the door across the street with socks on and Fred's slippers. She never put on any socks or pulled out the tissue.
Continuity mistake: At the beginning of the movie, the waiter is wheeling the cart out of the building. Two workers are loading the van, with Saman to order them around. One is wearing a hat, the other isn't. Hatless Guy walks out of the van first and is sprinting back towards the building, with Hat Guy noticeably behind, but in the next shot Fabrizio passes the cart to Hatless Guy and Hat Guy is already way past them both. (00:01:30)
Continuity mistake: When the awful cousin Charlotte hands Gwen the slice of unbirthday cake, she does it with her right hand, left hand, right hand. (00:04:20)
Continuity mistake: After Seligman offers to wash Joe's coat, she tells him not to and it's her coat. He shrugs it off and sets the coat on the bed and turns, walking away. It suddenly jump cuts to him being back at the foot of the bed facing her and asking her what happened.
Continuity mistake: Travers rides in a stretch limousine and Ralph, her driver, always puts her in the seat farthest back at the rear window. However, whenever she is seen inside the vehicle, she is sitting right behind Ralph, and easily reaches over and slides shut the window between the front seat and the back, even though there should be a wide space between where she is sitting and the driver's seat.