Character mistake: The sign for the hotel where Jake is staying at in Mexico says Tengo Quarto's para Renta. The word is spelled wrong. It should say CUARTOS. Also, there is no apostrophe s in cuartos. It is plural, not possessive.
Character mistake: In the finals of Video Armaggeddon the compere keeps making comments such as "Jimmy loses a life and starts over in world two", "Laura finishes world two", "Lucas finishes world two". All three times the relevant person is actually in World 1 - Level 3. In Fact at no point are any of the competitors in World 2 and the only time any of them is out of World 1 is when Jimmy uses the warp to access World 4.
Character mistake: Chick Gandil mispronounces Eddie Cicotte's name, calling him "Si-coty" instead of "See-cot."
Character mistake: Near the end of the film, Kirk mentions that he had a brother once, to which Spock appears surprised. Kirk then responds that he was lucky to get him back, referring to Spock's death and rebirth in the second and third films. One problem - Kirk DID have a brother, who died at the end of the original series' first season. Spock doesn't seem like the kind of person to forget about such things, especially as he was nearly killed by the same parasites. Spock's memory may still have been incomplete, although you'd think he'd know such a major detail about his best friend. However, McCoy should definitely remember Kirk's brother, especially seeing as he was the one who pronounced him dead.
Character mistake: In the movie they grab Genghis Khan in 1209 which would have been correct, he ruled Mongolia from 1206 to 1227. In the presentation at the end they say in 1269 he did this and that, that would have been Kublai Khan's reighn of terror in Mongolia.
Character mistake: Meek's first name is spelled in the credits as "Steven"; however, the letter being signed by the students accusing Keating of misconduct shows the spelling as "Stephen."
Character mistake: When Mrs. Barrett is on the school board stating her case, she said that the test scores on the practice exam were 35% below passing. Earlier in the movie, when Joe Clark opened the letter, the Eastside passing score was 33%, which was 42% below the required passing score of 75%. Since she was trying to get him removed, it would have been to her advantage to say 42% instead of 35% - 35% would have made it 68%, which would have still not been enough to pass.
Character mistake: The newspaper that reveals the combination of products that activates the Joker's poison has at least two grammar mistakes on the front page. The word "deodorant's" should not have had an apostrophe, and the word odoreaters was spelled "odoureaters," which has the British spelling of the word odor (Gotham City is obviously in the United States, not the UK). (01:17:10)
Character mistake: At the psychiatric ward, Ray says that Vigo is a XVII century tyrant; it's not a very fitting way to describe him, since he saw the XVII century for just a decade; as the book mentioned, he lived from 1505 to 1610 and was the scourge of Carpathia for the XVI century. (01:16:15)