Deliberate mistake: As Christine approaches the Phantom in his lair (just after he has abducted her), we see that she is wearing very dark black eye-shadow. Back in the dressing room after coming off stage, as she talks to Raoul, we saw her face in close up and she was not wearing any eye-shadow at all, even though the Phantom leads her through the mirror just after she has managed to slip on a robe over her undergarments and she has not yet changed to go out to supper (Raoul says she is to be ready in 2 minutes). Her hair becomes 'bigger' and wilder, too. The change in her appearance is a reference to her descending (voluntarily, I might add - he didn't drag her through that mirror) into the Phantom's dark existence and to her sexual awakening. (00:28:45 - 00:37:10)
Deliberate mistake: During the Trojan attack on the Greeks at the beach, before Hector and "Achilles" have at it, there are two separate close-ups of Hector's sword slicing across a man's face, who promptly spins around and spews blood. This particular man is enjoyed twice in two takes of the same shot, just before and after Odysseus' close-ups. Then as if that's not enough, a few shots later this spewing man is actually seen a third time, but this time from another angle. (01:42:30)
Deliberate mistake: When Prince Hapi says that Monique should be his seventh wife, she says "you have seven wives?" and he confirms. Actually if she is supposed to be his seventh wife he only has got six wives by now.
Deliberate mistake: When Tom Hanks is picked up at the airport by a taxi, its license plate number is TX7943. Later when he is picked up at the Ramada Inn, he is picked up by a taxi with a different driver, different numbers on the top, but has the same license plate number.
Deliberate mistake: Frankie's voice-over reading of the letter to his father does not match the text of the letter. He says, "Ricky Munroe told me. Trust him to put his big feet right in it. I've told him hundreds and hundreds of times." but the letter reads, "Ricky Munroe told me. Trust him to put his size threes right in it. He is rubbish at secrets. I've told him hundreds and hundreds of times." (00:21:15)
Deliberate mistake: When Alexander is giving his pre-battle speech at Gaugamela, some of the shots are 'flipped', which has the odd effect of suddenly making all of the phalanx pikemen left-handed.
Deliberate mistake: When Bridget lands in the pigsty, the crew members are outside the sty, around three metres from her. Yet when we see the repeated shot of her buttocks in the studio, it is filmed as if she had landed on the camera or very close to it, and at an angle that would preclude it being a close zoom.
Deliberate mistake: Throughout the film, scenes of several Cole Porter productions are shown being performed. These scenes all contain a well-known musical number. Two scenes in particular (after the Alanis Morissette number and immediately after the "So in Love" duet) end with the lead singer/singers bowing to the audience and then waving the other cast members on stage to take a company bow. The problem is that neither of those numbers appear at the end of the shows being "performed." The "So in Love" duet, for example, most definitely appears in the musical "Kiss Me, Kate" well before the Act Two finale. I assume that these mistakes were filmed deliberately to emphasize the importance of the songs in question, but they are still errors.
Deliberate mistake: The scene where Topher Grace is jogging on his treadmill in his apartment is reversed. His wedding ring is on his right hand. In scenes before and after, his wedding ring was on his left hand.
Deliberate mistake: When Napoleon asks the school secretary if he can borrow the phone, she pushes the phone toward him but in the shot of Napoleon you can see the phone never actually moved from before he asks to borrow it to the time he makes the call. This is only seen on the full-screen version of the film. The phone is not visible on the wide-screen version because the bottom portion of the image is cut. (00:07:00)
Deliberate mistake: The music in the 50s wasn't, by far, the Shakira pop and hiphop style that the people dance to in the movie.