When Erik and Charles are talking on the steps of the Abraham Lincoln Memorial, one can notice the WWII memorial in front of the Washington Memorial. The WWII memorial was not built and open to the public until 2004.
The Film shows CIA headquarters at Langley In 1962. The construction for the Langley headquarters didn't even start until 1965. The first secretaries didn't move into the building until 1968. In 1962 the CIA operated out of several different buildings in D.C.
Many of the ships and weapons seen in the US and Soviet fleets did not exist in 1962 at the time of the Cuban missile crisis. For example the US flagship is the USS Iowa, but the Iowa was not in service at the time. Even if she had been, the ship was not fitted with the CIWS Gatling gun defense system until the 1980s. Amongst the collection of missiles fired at the beach are Harpoon anti ship missiles, which came into service in 1977, and Tomahawk missiles, which came into service in the late 1970s. On the Soviet side the flagship appears to be a Kresta class cruiser, a design not in service until 1967.
In the attack on the secret CIA research facility, the security force is shown using an M72 LAWs rocket launcher to defend themselves against the attacking mutants. The M72 was not adopted by the US until 1963, that sequence was before the Cuban Missle Crisis which took place in 1962. Also the weapon was fired indoors, the back blast from the weapon would have killed everyone in the surrounding area.
Édith Piaf's "La Vie en rose" is playing on a phonograph in the concentration camp. That song was not recorded until 1946. Also, the record shown in the movie has a Decca label, whereas Piaf actually recorded the song for a rival company -- French Columbia, a branch of EMI.
The American troops in the truck in Russia with Charles and Erik and on the ships in the American blockade near Cuba are carrying M16 Rifles, very modern looking ones at that. The M16 wasn't issued till 1963 and if the time line of the movie is accurate the Cuban Missile Crisis didn't occur until 1962 so there was no way for these troops to have access to weapons like that especially the version that they are carrying which look like the shorter M4 carbine, which definitely didn't exist then.
On the wall map in the conference room in Moscow there is an icon indicating the location of a nuclear power plant in the western Soviet Union. This location corresponds to the location of the Chernobyl Nuclear Power Plant in Prypiat, U.S.S.R (now Ukraine). However, construction of Chernobyl did not begin until 1970, and Reactor 1 was not commissioned until 1977. When Erik is first seen as an adult the date is given as 1962, eight years before construction of Chernobyl began and fifteen years before its commissioning.
An Iowa class battleship is depicted in the film as part of the Cuban Missile Crisis blockade fleet. In real life, there was no such battleship in commission in 1962, the year of the Crisis. The only battleship to see service in the 1960s, the USS New Jersey (BB-62), was still in mothballs at this time and would not be in service until 1967. Furthermore, the film's CGI model of the ship shows her in 1980s configuration.
The black Cadillac in which Dr. Moira MacTaggert drives the X-Men to the Secret CIA facility in 1962 was actually a 1964 model Cadillac, which would have not existed in 1964. A 1963 model would have existed, however. You can tell it's a 1964 because the rear profile is "peaked," while in 1963 it was flat.
In the submarine, when Emma Frost asks Azazel if there is anything around he replies it is all clear on radar and sonar. A sonar ping is heard in the background with a distinct echo indicating a contact about four to five hundred yards away.
When talking to the CIA, Charles Xavier mentions that one of them is thinking about the "Apple Pecan" pie but, being English, he would pronounce it "pee-can" with the emphasis on the first vowel, not "p-caaan" with the emphasis on the second vowel.
In the beginning of the movie, when younger Charles meets younger Raven in the kitchen of his home, the younger Raven has a widow's peak hairline. When older Raven is introduced in the pub, she has a smooth hairline.
At the cantina, while Erik is drinking his beer at the same time with the two former Nazi officers exchanging deadly looks, the amount of beer in the glass of the officer standing in front of Erik changes when the camera angle changes. Seems like a mistake done during the editing of the scenes.
Before Shaw and his men attack the CIA HQ, Sean is shown eating an Oreo, but when Hank gets up to close the curtains, his hand is on his knee, with no Oreo visible. When the scene flips from the window back to the four mutants, he has the Oreo in his hand again.
When Magneto is lifting the submarine, he appears to be searching for it with his hand. In this scene, we can see that his hand is dirty and smudged with black. In the close-up shot of his had as he is lifting the submarine, his hand is more or less clean.
In the bar in Argentina, the barman pours Young Magneto a glass of Bitburger. As he removes it from the tap, the beer is still very frothy but as he hands it to Magneto, the head has completely settled.
When Charles is holding the gun to Erik's head while training, the gun is close to Erik's forehead, but not touching it. In the next shot the gun is touching Erik's forehead, then in the shot after that, it's back to being close, but not touching.
In one of the final scenes when Eric uses a coin to kill Shaw, the coin travels through Shaw's head drilling a hole and coming out covered in blood. Yet, when the coin falls on the floor, not a single droplet of blood falls from the coin and the floor remains clean.
When a young Erik gets angry and starts destroying the lab room through the glass in Shaw's office, you see the metal table with the one large, central, cylindrical leg, moved, flipped over and flung twice.
When Shaw is attacking the CIA facility housing the mutants, he holds a man by his throat in the main atrium. Right before Shaw is fired upon, he tosses the man straight up into the air and the man vanishes. He never comes back down or is shown to fall anywhere else.
At Charles' mansion, Raven/Mystique is lifting weights with both knees bent. Erik/Magneto walks in, holds the weights in the air and talks to Raven. As the camera goes back and forth between Raven and Erik, her leg is shown in an up position then laying flat on the bench without her having moved.
Magneto finds out that Sebastian Shaw is hiding in Argentina, in "Villa Gesell". When the scene takes place there the camera shows a view of mountains and snow. Actually "Villa Gesell" is a town on the beach in Argentina (no mountains there). The image shown on the picture looks like Bariloche, which is in the mountains and has a large German community.
When Shaw's submarine is hiding under the ice and Emma is going up to the surface to get him some ice, you can clearly see a very popular Swedish landmark named Lapporten in the background. This would suggest that they're actually hiding in the nearby lake and not in the sea. It would be very difficult, if not impossible to sneak a submarine into that lake since it's very far from the sea.
When Colonel Hendry meets Sebastian Shaw on his yacht, they are supposed to be in Miami. In one of the wide angle shots, you can see a long suspension bridge in the background. There are no suspension bridges in Miami. It appears to be the bridge near Jekyll Island, GA.
The General in the War Room mistakenly calls upon the mobilization of the 7th Fleet to intercept Soviet ships bound for Cuba. It was the US 2nd Fleet that intercepted the Soviet ships during the Cuban Missile Crisis. The 7th Fleet is and has always been, based in the Pacific (currently stationed out of Yokosuka, Japan).
The Soviet naval ships are shown flying a red flag with a large yellow sickle and hammer in the center. The Soviet naval jack was red with a white cross on the diagonal as well as from the center, a blue diagonal cross was superimposed on the flag with a small white sickle and hammer in the center.
There is a scene of a military parade on Red Square in Moscow. The parades there are held on May 9th (a WWII Victory Day). At some years there were parades for an Anniversary of the Socialist Revolution on November 7th. The movie is set immediately prior to the Cuban Missile Crisis, which was in October. Also the snow in Moscow would be very unusual for this time of the year.
Spelling/grammar during the Russian translation of Shaw's dialog. It says "Now they have their missles places in Turkey...", which should say "missiles" and "placed". They also, misspell missiles twice more.
When the Soviet and the American fleets fire their missiles toward the island, between the missiles fired by the soviets there is the "S-125M (SA-N-1) SAM" which is a surface to air missile designed to shoot down airplanes and it has no ability to be launched toward land targets.
In the first X-Men movie, Charles Xavier says that he was 17 when he first met Erik Lensherr. In this movie, Charles and Erik are depicted as meeting for the first time and Charles is clearly older than 17, having already graduated from University.
When Xavier and Erik were confronting Emma Frost in the Soviet Union, some might think that it would have been impossible for Erik to crack Emma's neck with the metal bed frame because diamond is one of the hardest substances known to man. Hardness does not prevent cracking. There are different types of material strengths. Diamond's hardness does not mean that it is invulnerable to all types of stress.
In the bar scene, Charles tells a woman she has a mutated MCR1 gene. While the human melanocortin 1 receptor gene (note MC1R, not MCR1) was not cloned (discovered) until 1992, Charles is shown in this series to have knowledge in advance of the scientific world at large.
An SR-71 Blackbird can only hold a maximum crew of 2 in the cockpit. The scene where they are sitting in the back is actually just engines. However, despite their similar appearances, the plane we see the X-Men using here is not a Blackbird, but an early prototype of the "X-Jet" that they use in the films set later.
When the submarine part of the Caspartina separated from the ship part, the ship part would have lost its ballast and water-tightness and immediately sunk on top of the submarine part. However, if the boat was specifically designed for this sort of two-craft partnership (which this pair obviously was), the boat craft would have extra ballast, an 'airlock' system to restore water tightness, and additional fittings to allow it to function. (Craft of this type do exist today, although the submarine components are smaller).
Erik's memory of celebrating Chanukah with his mother includes a seven-branched candelabra. In Jewish tradition, Chanukah is celebrated with an nine-branched candelabra. However, at every other time of the year, Jewish families will frequently use 2, 3 or 7 candles to celebrate the sabbath every Friday evening.
In the establishing scene outside the secluded Russian manor house an ostensibly Russian military helicopter lands, clearly displaying its UK Civilian Register mark of G-CHOP. The aircraft is a licence built Westland AB-47G.
When Magneto pulls out the submarine, he uses his right hand to hold on to the Jet and left hand to lift the submarine. But in the subsequent shot when Beast moves the jet towards the beach, Magneto is shown on the other side, with the holding and pulling actions swapped.
The goof items below may give away important plot points.
At the end of the movie, Moira is pushing Xavier in his wheelchair. When they stop, the chair's spokes form a perfect X. The camera then jumps to a closer shot as Moira walks around the chair; the X is rotated forward without moving the chair.
when Xavier is shot on the beach at the end of the movie, the wound is depicted as being at the base of his spine. Since the spinal cord ends midway down the lower back, such a wound would not have resulted in paraplegia. Rather, the wound would have to have been between his shoulder blades to result in complete paralysis of his lower extremities.
When Mystique emerges from the stranded submarine in the form of Sebastian Shaw he is seen to be wearing the psychic blocking helmet. This is entirely possible as the first time Mystique sees Shaw when he attacks the CIA base he is wearing the helmet and takes it off when he realizes Xavier isn't there. Since that was her first image of Shaw it is probably the image of him that stuck in her head.
When Erik and Charles have Emma Frost captured, Erik cracks her neck while she is in diamond form. This does not explicitly prevent her returning to her diamond form. Erik invites Charles to give her a gentle knock if she does so, implying both that she is still able to do so, and that she has become extremely fragile. Therefore she does not use the form again during her capture and containment. There is nothing to suggest that she cannot heal this damage over time, just as any person heals cuts and bruises given long enough and her diamond form being undamaged at the end of the film would support this.
In a wide shot, Charles moves his legs when lying injured on the beach, despite the fact he is newly paralyzed. It is possible for Charles to have muscle spasms in the legs still, since he was newly paralyzed within a few minutes of the camera shot.
Charles Xavier mentions towards the end of the film that the assault suits he and the X-men are wearing are bulletproof but later gets shot in the back and paralyzed. Just because they are resistant to small arms fire at a distance doesn't mean they're completely bullet proof. Besides this, Xavier was hit by a bullet Magneto had deflected, when Magneto 'flicked' the bullet away he could have doubled or tripled its usual velocity, something the suits weren't designed to be resistant to. Besides, the bullet hit him but it didn't penetrate. Bulletproof vests don't absorb impact.
After Shaw's sub is catastrophically wrecked on the beach, Magneto walks through its seemingly undisturbed living quarters; a cushion rests on the couch, books and plants remain on shelves - nothing is out of place.