Continuity mistake: When The Rock is putting early in the movie he is on the phone, when the shot comes back to the room the putting green is missing. (00:01:50)
Continuity mistake: When the squad arrives at the hotel to arrest Mickey, they are on the street with two cars behind them, but in the upper view those cars disappear. (01:33:25)
Continuity mistake: It is mentioned in dialog that during the last bird attack (the first film), a red rain was visible that seemed to drive the birds mad. However, at no time during the original film is there any red rain visible.
Continuity mistake: Cereza takes a bath. She does not have glasses in the bath tub. Thrice during this two minute period, the film shows her glasses to be in the hotel room, on her bed, along with her dress. And yet, when Cereza comes back to the room, she has glasses on. (00:38:00 - 00:40:00)
Continuity mistake: After the fake movie intro, the two guys drive to a secluded place where their drop is supposed to happen. "Cheno", the one in the driver seat, has the right hand down his side and the left hand on the right side of the steering wheel in a pretty unique position. But in the reverse shot, it's his right hand on the wheel. (00:03:00)
Continuity mistake: Max is wearing a suit jacket while he is beating a young woman. He throws her against a dresser and then when he goes to pick her up he is in shirtsleeves.
Continuity mistake: In the scene where Terrence Howard is questioning Colin Farrell his right hand first appears with a ring and watch, later in the scene it appears on his left. (01:08:25)
Continuity mistake: The movie opens with a man walking with a dog by a body of water. He is holding the leash with his left hand and the dog is by his left side. Cut to the next shot taken from across the water, the leash is now in his right hand and the dog is on his right. (00:00:20)
Continuity mistake: When Oscar is on the phone to learn about the location of the job interview in the warehouse district, the paper that was on top of the payphone jumps suddenly in the hand that holds the receiver to his ear, with the phone call already being over. (00:22:25)
Continuity mistake: Ari during the break from the party begins her seductive scheme; posing as a waitress at this guy's own engagement party, she approaches him while he is -for some reason - in the parking lot, makes him smoke a joint for the first time in front of his car, and kisses him - apparently all of this is super easy, barely an inconvenience. When she touches his face, she lowers her fingers from the chin at least 3 times in separate shots when she is whispering things to him. (00:11:50)
Continuity mistake: In the scene at the beginning where Simon Yam is telling Karen Mok that the case she is working on is closed, as he holds her shoulder to turn her towards the door in one shot, and her hair is completely at her back behind her shoulders, but as he turns her around and the shot changes, her hair on the left side is seen over her shoulder in front.
Continuity mistake: In "China", when the trackers and the hunters are walking through the forest at night, between shots, the group goes from five people to four people back to five people. (00:30:46)
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: 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: As El Camaleon pulls the Cuba Gooding Jr. face off, there's an unshaven neck with a tattoo visible under it. After the cut, Lady Gaga's face (also presumably unshaven admittedly, but not visibly so) comes to light under a mask of visibly lighter skin tone. (00:45:05)
Continuity mistake: When Schwarzy tells the helicopter pilot to "Go down!" to fetch Breslin, the helicopter gun is missing the ammo belt. (01:40:10)
Continuity mistake: As the movie ends, the heroes walk from the trashed red robot towards the ambulance & trucks, and the woman sitting in the ambulance has a blanket over her shoulders, then there's no blanket, then it's on her knees, then her shoulders, then it's gone...