Other mistake: When either Kyle or Carson run down the staircase the rails move significantly. On a real plane this would not have passed the pre-flight safety checks and the plane would have been grounded. Nothing in the film suggests the rails would have loosened.
Other mistake: When Owen first meets Dodger, and asks if its that obvious he's a transfer, she tells him "It's a small school, word travels fast." During a flashback to this scene at the end of the movie she says "word spreads fast," instead.
Other mistake: When Amy first goes into Marla's apartment, she sees that the food in the kitchen is spoiled; there is a few weeks worth of mould on the scattered dishes and the food on the plates by the sink is especially bad. Yet on one plate by the sink, there is a piece of bread still perfectly white and free of decay, though it is surrounded by other mouldy scraps. The shot is only visible for a moment.
Other mistake: Throughout the movie large footprints of heffalumps are shown. However, when the heffalumps bound around, they never create any footprints of any kind.
Other mistake: Towards the film end, when George climbs up stairs with the gun to kill others, he walks into the passage and shuts the door. A mirror is there in the passage, but there's no reflection of George in it. (01:15:15)
Other mistake: In the scene where the guys first fly into Newark, they are seen getting off the airplane after landing. When the camera pans around the back of the airplane there are orange gust locks on the rudder and elevator. The gust locks are used when parking the airplane overnight and would not be installed just after landing.
Other mistake: At the very end, the Durmstrang ship is leaving, it's away from the 'bank', firing its cannon. And then we see the Beauxbatons girls leaving Hogwarts... Followed by Durmstrang students whose boat has already left. (02:22:00)
Other mistake: When they open the bag of money and fan through it, you can see the back bill says TWELVE - as in a twelve dollar bill.
Other mistake: The rear interior view at St. Mark's shows "pews for two" along the left-hand side and there is not enough space on the right-hand side for similar pews. In the front view, there are "pews for two" along the left-hand side and no room for pews along the right-hand side. (00:10:52)