Continuity mistake: In the beginning when we see Nightcrawler get past the metal detectors, in the first shot we see him standing still next to a striped bench. The following overhead shot, the bench is now completely red with no stripes. (00:02:35)
Continuity mistake: When Nightcrawler is inside the Oval Office, he jumps on the President, and the President's leather chair changes direction between shots. (00:04:35)
Continuity mistake: When Wolverine is first seen, the camera pans along a barbed wire fence which is almost straight, yet in another shot, all the barbed wire is broken off the fence or is hanging down from it. (00:05:45)
Continuity mistake: When Wolverine is tramping through the snow to Alkali Lake, you get a long shot of him looking at a wolf with the sides of his hair are styled so they're sticking up at least three inches. After he goes through the gate, his hair is totally flat. (00:06:10 - 00:06:55)
Continuity mistake: At the beginning of the film in the museum scene when we first see Pyro and Iceman, there is a man with a green sweater that is sitting behind Iceman. In the next shot he's sitting beside him, then is behind him in the next shot. You can also that in one shot he is looking in Pyro's direction but in the next shot, he isn't. (00:09:05)
Continuity mistake: Near the start in the museum, when Pyro is asked for his lighter and refuses, watch him playing with his lighter. One shot shows the top flipped open away from him, but when the angle changes it's facing towards him. There's no time it's out of shot for it to move. (00:09:35)
Continuity mistake: In the museum scene at the beginning when Iceman freezes the guy on the floor, you can see a guy standing beside him with jeans and red boots on. The shot goes back to the guy on the floor and the one who was standing beside him is now standing behind him. (00:09:50)
Continuity mistake: When we see Logan enter the mansion and Rogue comes to greet him, Iceman is standing just behind Rogue, then the camera cuts to a front view, and Iceman is now shoulder to shoulder with Rogue, then it cuts to the back again, and he is back behind Rogue. (00:15:45)
Continuity mistake: When Wolverine returns home to the Xavier mansion, Rogue greets him, they talk, and when Jean arrives Rogue leaves them alone. In one shot Rogue's hair is over her left shoulder running down her chest, but in the following shot all of her hair is at the back. (00:16:15)
Continuity mistake: Close to the beginning of the film when we see Wolverine approach Cerebro, you can see him from the back entering Cerebro from the left, yet on the face shot he is entering Cerebro from the right. (00:18:35)
Continuity mistake: When we see Logan in Cerebro with Professor Xavier trying to find Nightcrawler, Xavier's metal hat in one shot is completely covering his ears, yet in several shots after it's not covering his ears and the hat is a lot looser. (00:19:30 - 00:20:30)
Revealing mistake: In the beginning of the movie when Wolverine puts the cigar out in his hand, you can see the mark of a wedding ring on his ring finger (Hugh Jackman is married). Even if Wolverine got married during the "blurred" bit of his memory so doesn't remember it (tenuous at best), his healing ability would have removed any ring mark. Either way it just doesn't belong. (00:19:50)
Continuity mistake: Near the start Logan is inside Cerebro with Xavier and Xavier turns to talk to him. The chair he's sitting in doesn't go any higher than the top of his back, yet a few shots later, the chair is now above his neck. (00:20:45 - 00:21:15)
Deliberate mistake: Almost trivia, but not quite. When Mystique's looking through the guard files to find a suitable candidate, lots of photos flash up very quickly before she finds the guy she uses. Of note is that Bryan Singer pops up in guard uniform (with his own name), and so does someone called "Donner, L". This is most likely referring to Lauren Shuler Donner, one of the producers, and sex is specified as "F", but the photo is of a stubble-coated man. (00:23:10)
Continuity mistake: When Mystique is looking around in Stryker's computer, she notices a folder marked "Cerebro", next to the "Delete" icon on the screen. However, when she opens the folder, we cut to a wide shot and the icons around the delete icon have renamed themselves, plus the cerebro folder itself has disappeared. (00:23:10)
Continuity mistake: When Wolverine is in the schools kitchen with Iceman, you see Iceman point to a cupboard. If you watch closely between shots Iceman's finger changes from being a little limp and pointing down, to being straight and pointing up. (00:29:35)
Continuity mistake: When Wolverine handed the bottle of Dr Pepper to Bobby, he was holding the body of the bottle. But when the shot changes to show Bobby taking the bottle, Wolverine was holding the bottle neck. (00:30:00)
Continuity mistake: When Wolverine can't sleep, he hands Bobby the soda bottle and the contents are almost full, but when Bobby blows on the bottle and hands the chilled bottle back to Wolverine the contents are much lower. Then when Wolverine drinks the Dr Pepper, the bottle is full again. (00:31:00)
Continuity mistake: When Xavier is in the plastic prison with Magneto, at the end of this scene, you see Xavier put his hands on the doors of the prison, but in the following shot from outside the prison his hands have changed positions on the doors. (00:33:10)
Suggested correction: When Xavier is in the plastic prison with magneto, at the end of the scene Xavier has not changed his hands positioning, his right arm is up and his left arm is half way, on the following shot outside the prison his right arm is up and his left arm is up half way, it's a mirror image.
The mistake isn't saying his right and left hand have switched because they were confused about the "mirror" image. You can see the left arm is lower. At first the left elbow is above the frosted part, but in the next shot, it's well below and the hand is closer to the frosted part.
Continuity mistake: When Cyclops encounters Lady Deathstrike at Magneto's prison and knocks her down with his optic blast, watch her eyes as she's getting up from the ground. Instead of the greyish white they should be while under the control of the serum, they're a rather nice looking shade of blue. When it shows her standing, they are white/grey again. (00:34:45)
