Corrected entry: Banshee shouldn't be able to fly, or even glide, while he carries Havok off the battleship.
Corrected entry: In the beginning of the film, Shaw gives young Erik a coin. This coin is a 5 mark Nazi coin dated 1934, yet the coin was only produced from 1936-1939.
Corrected entry: In Argentina, the bar scene. For the first shots of the scenario Erik does not have his Jewish I.D. Code on his arm, but in a later scene he shows his numbers to the "Pig Farmer" and Tailor.
Corrected entry: Hank McCoy, for some reason, created Cerebro with the precise abilities to amplify Charles' powers and allow Charles to use it to locate other mutants, even though Hank would have had no idea that anyone could use the machine... It was even mentioned that the machine was pretty much useless without Charles.
Corrected entry: In the scene where Erik confronts Shaw on the boat, Emma's hairstyle changes from being down to being in a half updo right after Shaw chastises her for harming their own kind. (00:32:25)
Corrected entry: When Erik is destroying Shaw's yacht with its own anchor, in the shots of the chain slicing the top half of the boat, the chain exerts a forward force on the yacht, but the boat is stationary. This is impossible considering it is floating in water and the slightest nudge would make the yacht move.
Corrected entry: In the movie when Xavier is using CEREBRO for the first time keep an eye out and you can briefly see young versions of Storm (girl with white hair) and Cyclops (boy with soccer ball and dark sunglasses).
Corrected entry: Emma Frost can turn into diamond, which is the hardest material in the world, yet the Erik is able to use the bedpost, most likely made out of a soft metal, to both strangle and starting to crack her neck.
Corrected entry: In the scene where Erik is in the bar in Argentina, after the fight starts the bartender says "Oye, cabron". From his accent it's obvious that he's supposed to be a native Argentinian, but the word "cabron" is never used in the Argentinian dialect - it's mostly used in Mexico and Spain.
Corrected entry: The scene at the beginning is set at a German concentration camp in occupied Poland in 1944 (as annotated). Scientist Sebastian Shaw, who has observed Erik bending the metal gate through a window, calls the boy up to see him. On entering Shaw's office, the song "Non, je ne regrette rien" is playing. The song was written in 1956 and recorded by Edith Piaf in 1960.
Corrected entry: Eric manages to move a large satellite dish a few miles away, yet in X2, while in the plastic prison there's plenty of metal within that sort of range.
Corrected entry: Moira McTaggert, who has NO mutant powers to prevent her aging, is shown to be in her 30s in this movie set in the 60s. The X-Trilogy is set in the 2000s according to the novelization. That's a gap of 50 years, so Moira should be in her 70s in the trilogy. Yet, when we see her in X-Men 3, she's barely pushing 40.