Other mistake: When Cody is learning how to talk to girls and the hologram girl is used. She tells him to "Come here." She pulls on his chin to bring him closer. You can see his skin move and his head is pulled. Holograms can not touch or grab things.
Other mistake: During the first fight scene on the bridge, you can easily tell the difference between Yun-Fat Chow and the stuntman who does his stunts. The stuntman has a small balding spot on the back of his head and Yun-Fat does not. You can see this throughout the scene whenever the camera angles change from a closeup to a wide view. (00:02:10)
Other mistake: If Harry was born in 1969 and is 18 when he attends school (based on "8 years later" then "10 years later"), then the year should be 1987, not 1986 as the movie states. (00:01:25 - 00:01:52)
Suggested correction: This isn't necessarily true. The +8 and +10 years don't have to literally be to the day. Maybe Lloyd hasn't had his 18th birthday yet - it could be days away, making 1987 valid. Lloyd was born in 1969, but I don't think that was indicated for Harry. Harry was "held back 3 years", so may have been born in 1968 in order to be in the same grade as Lloyd, who was held back two years. Otherwise, Lloyd would be a sophomore and Harry a freshman, which questions how they're in classes with jrs/srs?
First off, the mistake isn't focused on anyone's age, just the date. Second, we know Harry was born in 1969 since the film starts with his, so your comments don't make sense. It says 1969 and the 8 years later followed by 10 more years later, which would put it at 1987.
Other mistake: When Sam is selling his onions, he asks an old man to take his hat off so he can see if he's bald so he'll know if he needs to sell him some hair growing tonic. The old man is just barely taking off his hat and before Sam can even tell the old man has no hair, Sam says "Mm hm, just as I thought."
Other mistake: The same cockpit interior mock-up used for the propeller plane (Sierra) near the beginning of the movie is seen again as the Airbus jet at the very end.
Other mistake: In the scene after Dave throws a calculator at a colleague there is a very weird 3-second establishing shot of his apartment building. In this short span shadows fall over the building twice, and it changes between fully lit and fully in the dark twice. In the end there is the silhouette of some equipment covering the lower third of the screen. (01:11:30)
Other mistake: When Andie goes over to the diamond display (at the party) she isn't wearing any jewelry, and touches her ears a couple of times, demonstrating there's nothing on them. Later on she is seen wearing 'Isadorra' (the yellow diamond necklace) and a pair of matching earrings, which are certainly large and sparkly enough that they would have been visible if she was wearing them earlier. When security chases after Andie after she leaves, they only take back the necklace. I guess that the diamond earrings weren't that important. (01:39:30)
Other mistake: When Will's mother steps into the bathtub where his father is already lying in, the camera switches between both persons and the water level (in relation to the bathtub edge) on each person's side is on a different height. Yet when both persons are shown, we can see that the bathtub edge is fully horizontal, so the water level should be the same on both sides. (01:25:00)
Other mistake: Daniel was number six that she dated and treated as a boyfriend before Peter, so In reality Peter was number seven.