Other mistake: When Adam comes in and says "when I woke up this morning, the pain was gone", Connie is mouthing his lines behind him.
Other mistake: When in the tub in Arkansas, Wyatt is bare chested. In bed with Josie he's suddenly sprouted a lush garden of chest hair.
Other mistake: When Alfalfa takes some flowers to Darla, Waldo (the rich boy) turns up and Darla's friends comment on the rich kid. As one girl is saying her line, 'He's smoother than a baby's bottom' you can see the girl next to her mouthing the same line.
Other mistake: The Russian flag in the Russian commander's office is upside down.
Other mistake: The kids dare each other in a decrepit water tower which is mysterious in a number of ways: 1) Draining the water causes a powerful vortex, but the water level is not going down. 2) No one seems to work the bottom valve, but the vortex comes and goes. 3) It is absolutely impossible that anyone could swim through such a vortex, but Stu does. 4) The rotten roof breaks under the weight of little Billy (the ice-cream excess?) but carries his brother who weighs about 4 times as much. (01:27:00)
Other mistake: When Derek and co are 'shooting' the musicians dressed as animals, Derek shoots at his foot to show that they are harmless. AS the arrows are covered in red powder, surely his foot would go red? After all, every shot at the musicians made them get a red mark.
Other mistake: When Beth visits the Hummel's house, the Hummel baby is supposedly crying because he is sick. In reality, the Hummel baby is crying because the Hummel mother accidentally bends back the baby's foot, when she hands the potato that Beth gives her, to one of the Hummel daughters.
Other mistake: The first plane to explode has a very neat symmetrical blast originating from underneath the plane - which is in fact wrong given that only one charge was placed on the side of the plane. The plane would be badly damaged and probably jack knife through the side of the hangar instead.
Other mistake: In the brief scene in which Nicholas Andre and J.P. Shay are talking about the killing of the owl at the preservation society ball, if you look very closely out the very bottom of the window, at the very end of the short scene (right after Andre says, "Their guys aren't just anybody, they're good"), you can catch a brief glimpse of part of the box containing the victim who is trying to escape (this box was completely excluded from the film).
Other mistake: I know most goons in movies are bad shots, but this is stupid. There are at least 20 Bison Troops in the room. There is one Guile. The guards have machine guns, while Guile has a handgun, with only 1 or 2 clips. Yet these troopers all miss him, even the ones on higher levels of the base, which give them a far better view of Guile.