Character mistake: In the scene when Gillian and Sally are dragging the boyfriend in to put him on the table Gillian says, "Watch his balls Sal". It is in Nicole Kidman's native Australian accent and the rest of the movie she speaks with a Northeastern US accent.
Character mistake: After Reed proposes to his girlfriend, he calls Julia and leaves an excited voicemail telling her he has huge news. When Julia listens to what is supposed to be the same voicemail, the wording and tone are completely different, leading Julia to think something was wrong, such as his girlfriend declining the proposal.
Character mistake: Early in the movie Cary Grant is on the beach and is told he has a phone call. While conversing with Bertani, Cary Grant has the handset backwards - he is speaking into the earpiece and listening to the mouthpiece where the chord is attached.
Character mistake: When Hollywood Montrose tells Jonathan Switcher that all the female mannequins have been stolen, they both run into the front window where there's a female mannequin.
Character mistake: Marcello tells the girl to get his niece an ice cream, he then, when speaking to Frances, refers to the little girl as "my nephew."
Character mistake: In the scene where Stewart calls Nicole at the end of the movie, he tells her that he got a horse shot in the leg, when in fact they showed him getting the shot in his neck.
Character mistake: In the scene where Kris's knowledge is being tested, he incorrectly gives the vice president of President John Quincy Adams. Kris states John Quincy Adams' vice president was Daniel D. Thompkins. That's wrong. John Quincy Adams' vice president was John C. Calhoun. Daniel D. Thompkins was the vice president under President James Monroe.
Character mistake: Debbie is doing an "All 80s weekend" on her radio show, and the film's soundtrack is based on exactly the same idea. Debbie plays 'Rudie Can't Fail' by The Clash. This is from the London Calling album, which was released right at the end on 1979 in most countries. The song was never released as a single in any year, so it's definitely a 70s song. What's interesting abut this mistake is that the soundtrack was selected by former Clash lead singer Joe Strummer.
Character mistake: During the fight in the double deuce where Wesley brings Jimmy in to take all the bouncers on, Jimmy takes on Wade, and Dalton comes to his rescue. Afterwards Wade says to Dalton 'same town new story', when in fact the line should have been, 'new town same story'.
Suggested correction: Wade said it that way on purpose. He was alluding to the idea that there is something different about this town's situation, compared with all the other towns where it was the same old situation.
Character mistake: When Anastasia has to make out the 5 million dollar check to "cash" to get the money to release Mia, she signs the check with her old last name, "Anastasia Steele" instead of "Anastasia Grey", which is written on the top left corner of the check.
Suggested correction: A key point in the movie is how Christian is upset that she didn't take his name in her work life, so it wouldn't be unreasonable that she signed the check using her maiden name (it also could have been just as easily a force of habit thing, it does take time to get used to using the correct name!).
Character mistake: In the scene when Jennifer Aniston is driving in the parking lot to take her kids to meet Brooklyn Decker, she is driving a Chevrolet. At the end of the movie, when she's confessing to Nicole Kidman, she states that she drives a Honda.
Character mistake: When Jenny is dead, Ellis attempts CPR on her, but his hands on her chest are far too high; they should be just up from the base of her sternum, his are nearly under her chin.
Character mistake: When Cary Grant enters Deborah Kerr's apartment he greets her by saying, "Hello Debbie." Kerr is Terry.
Suggested correction: He says "Hi, Terry", calling her by the right name.
Character mistake: At the football players funeral, the guy on the left is still breathing, despite being dead.
Character mistake: When the police scan Leeloo the first time, the computer reads "Commencin" instead of "Commencing."
Character mistake: When the Smiths first enter the store Home Made, the camera pans around and faces the store's large display picture which reads, "The true measure of a home lies in it's kitchen," but the word "it's" should be "its."
Character mistake: When Carl answers the door to the LDS missionaries, they are not wearing their black name tags.
Character mistake: The movie opens with the infant Molly Brown in a basket being swept down a raging river. She crashes and crawls up on the bank. No one else is around. But when the grown-up Molly tells her "pa" that she's going to Denver, she says, "Thank you for pulling me out of the flood."
Character mistake: At the poker game when Stella and Blanche come back from their movie, Stella is near the wall with her back towards Marlon Brando. As she says her line "how much longer is this game going to continue?", you notice Marlon Brando also says that line to himself as if he memorized the screenplay.he responds "Until we get ready to quit" and slaps her butt. (00:31:15)
Character mistake: After the math club students, in unison, cited pi to 3.141592, Percy continued with "65839" - but only the "65" are correct. He should have said "65358..." before being cut off (or "65359" if he was rounding up the last "89793238"). Even though the movie is classified as a comedy, Percy was showing off, but he was wrong. Charlie, Math Club Advisor, also committed a mistake because he stopped Percy by saying "Percy, we got it. Good" (as though Percy was correct). (00:04:29)