Other mistake: When Walker and Michelle fall down the steps at Dede's apartment, Walker lights a match to show Michelle the matchbook. The light from the match flickers on their faces but if you watch closely you can see the match go out as soon as Walker strikes it. (00:54:45)
Other mistake: In one shot, during the lynching, the noose comes undone from the character's neck while he is hanging.
Other mistake: During the first volley from the laser satellite, Kaneda is less than 30 meters from Tetsuo. A massive explosion and fireball hundreds of meters wide is shown within seconds, but somehow, Kaneda survives despite close proximity to the blast. (01:36:00)
Other mistake: When Eddie Valiant gets thrown out of the Ink and Paint Club, he is already starting to go through the air as the gorilla moves his hands to throw him. (00:21:20)
Other mistake: Right after Heather Duke and Heather McNamara drop in on Veronica and Betty Finn playing croquet, Veronica talks to her parents about the suicides. She still has a croquet mallet in her hand, so little time can have passed. Heather Duke rushes in with a shopping bag, and tells Veronica that while at the mall they heard about Martha Dumptruck's suicide attempt. But Heather Duke had just left Veronica's house - there wasn't enough time for these events to happen.
Other mistake: Poirot realises that the champagne was poisoned because he happens to notice two cockroaches sipping the spilled champagne instantly died, in fact FIVE are dead when he looks again. This is quite cartoonish; besides the fact that roaches wouldn't die that quickly for that (if they would), we are in the middle of the ballroom/party hall of a luxury cruiser; if the moment something vaguely edible happens to fall on the floor there's half a dozen ravenous cockroaches jumping on it, people have better things to do than dance; that's one massive infestation.
Other mistake: When translating Dutch for English, one translation uses "their" when it should've been "there." It's in the scene when we first see the lead cop talking to his daughter.
Other mistake: The 3rd movie takes place 5 years after the original, since Kristen is still in high school this one can't take place too long after that. How does Nancy's house get so run down in only 5 or 6 years?