Other mistake: Mr. Phillips told Michael (Danny) that he'd like to hear him play on his "Steinway at home", but didn't say when or give Michael his address, but Michael was able to ride his bike to the Phillips' house. Michael was in this new school (and State) for only one day, so it seems unlikely that he'd know where Mr. Phillips lived. (00:26:33)
Other mistake: Ok, this is being nitpicky, but in the scene where Freddy is pretending to be paralysed, and Lawrence (pretending to be a doctor) is whipping him on the legs in front of Janet to taunt him and get him to crack, in reality, Freddy's face would have been bright red from the pain. He could never hide that.
Other mistake: When Angela starts up the chainsaw (to kill Judd with) we hear the sound of it starting but you can see it is not on. (00:35:54)
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?
Other mistake: When Frank and the Ghost of Christmas Past are at the office Party where the younger Frank is still working, as they stand by the entrance door two women leaving move in closer to try and avoid bumping them - despite the fact that the Ghost said earlier they couldn't be seen or affect what's going on.
Other mistake: Immediately after Fagin deposits Oliver and the dogs on the sidewalk, Oliver has no shadow. Then, a few scenes later, neither Oliver nor Tito have a shadow.
Other mistake: Barry is supposedly dead at the end but when the screen brightens before the shot pans up, his head wiggles a bit.
Other mistake: Christina suggests that they have found Atlantis. However, they start in Hawaii, which is in the Pacific. The general consensus is the Atlantis is in the Atlantic (or Mediterranean) and not the Pacific. Some people do suggest that the lost continent of Mu is in the Pacific.