Continuity: When Wolverine crashes into the tree knocked over by Sabertooth, notice that the entire front of the truck gets completely folded up and the windshield breaks into a thousand pieces. In the next frame, Wolverine gets thrown through the UNBROKEN windshield and the front of the truck is practically undamaged...

Continuity: When young Magneto is struggling with the guards at the concentration camp, the father's star switches from one side of his chest to the other.

Visible crew/equipment: After Toad spits his slime at Jean Grey he falls to the floor. You can see the tether that was holding him in mid air.

Visible crew/equipment: Just before Sabretooth grabs Storm at the train station he swats a guy aside who was standing in line behind Storm. You can clearly see a wire attached to the guy to yank him off-frame.

Visible crew/equipment: Right after the scene where Sabretooth dispatches the Liberty Island guard, the camera switches to a head on shot of Magneto's boat ferrying the torch.  As the camera moves upward, you can distinctly see the head of someone crouching down next to Mystique as she captains the boat and it is actually the guard that was the boat pilot.

Visible crew/equipment: In one scene Magneto makes two police cars fly up into the air. Then in the shot when they come back down a thick wire is visible, attached to the bottom of the car pulling it down

Revealing: In the middle of the film when Magneto goes to get Rogue from inside the train, he opens the train up, and if you look behind him you can see the roof of the studio.

Continuity: Close to the middle when Senator Kelly hangs over the edge of the cliff face, Magneto pulls away the metal bars and crosses his hands/fingers twice.

Continuity: When Magneto discovers Senator Kelly has got out of his barred window, he then leaves the room, out of an opening he made in the barred door. As she leaves, between three shots the amount of bars that are bent on either side of the opening actually differs.

Continuity: When Mystique reveals herself to Senator Kelly on the helicopter, her blue body is appearing and it shows Senator Kelly watching for a few seconds, but when it shows Mystique again, the blue body thing continues from the part it left off at. It should have been to her legs at the rate it was going at before.

Revealing: The metal bar wrapped around Storm's neck in the Statue of Liberty is noticeably wrinkled. Obviously a painted strip of foam rubber.

Continuity: Right after Wolverine slices the tip off one of the Statue of Liberty's prongs, he strikes a dramatic pose: left arm cocked at his chest, right arm extended. In the next shot, his right arm is at his shoulder and his left is in front.

Visible crew/equipment: In Toad's final scene of the movie, when he is beginning to fight Storm, he leaps into the air onto the balcony railing. If you look at the back of his belt, his wire is very, very obviously visible. There are several times within the movie when Toad or Storm has a wire showing, but none so obvious as that one.

Visible crew/equipment: The camera is visible in Cyclops' glasses when he is in Logan's room and says, "Oh, and Logan: stay away from my girl."

Continuity: After the guy comes at Wolverine with a knife, Wolverine holds him against a wooden post. His jacket is off his shoulders after being pushed against the post, but when Wolverine slices the shotgun in half the jacket is back on his shoulders.

Continuity: When Rogue is seen for the first time, her hand is moving up photographs on the wall, and if you look closely there are some kind of red poppies when she reaches the end, yet when it cuts to another shot a bit further away, her finger is a lot further down the wall from the red poppy/flower.

Continuity: When Mystique and Wolverine are fighting, Mystique lifts up a chain link door and Wolverine cuts through it with his claws. It splits and the two pieces go separate ways, yet in the following shot the door is on the floor near Wolverine with only one side cut.

Continuity: When Cyclops and Storm are in the train station, Storm is held up by Sabretooth, Cyclops spots this and starts to walk over to help. He stretches his arms out between a lot of people to push two people out the way, yet when the shot changes to Toad's POV all the people around him are at least two to three feet away from him.

Continuity: Just after Sabertooth has dropped the Senator into the water, the mutated Senator pops out of the water. In the first shot, he is facing the boy, but in the next shot he has his back to the boy, then facing the boy again. Also, when he pops out the water he is only a few feet away from the boy's yellow boat, yet in another shot he is much farther from the boat.

Continuity: At the start when Rogue walks into the bar, when she walks towards the cage, note all the things around her from the camera's perspective (which is from behind her): the wooden plank in front of her which she walks around, and the burning can to the left of the screen. When the camera cuts to the front, the wooden plank is not there and neither is the burning can (now to the right of the screen).