Other mistake: After they take off from California, Kirk gives a heading to Alaska. He then tells Sulu "full impulse power", and Sulu says "aye, ETA 12 minutes." Full impulse is 1/4 the speed of light. No way they would use speeds like that to go a few thousand miles.
Other mistake: When the autoguns fire at the aliens for the second time, there is a flashcut of an alien being blasted apart. Watch closely; it's the same clip of the alien that Vasquez shot and subsequently sprayed Drake with acid. (01:18:00)
Other mistake: When they first get into space and Tish removes her helmet her left earring is free floating, which would be expected in zero gravity. But after this first shot, her earrings hang down as effected by gravity. Also all three of the girls hair hang down with gravity the whole time they are in space. (00:54:45 - 01:03:15)
Other mistake: How does Dola know that Sheeta's pigtails were shot off? They had been outside in their aircraft the whole time and once Dola got Sheeta in a tight hug, the situation doesn't call for any time for her to explain what happened.
Other mistake: The tree used to hold up Number 2 is very thin and weak looking, yet it supposed to be supporting a 400lb robot. Strong tree. (01:13:25)
Other mistake: When Seth comes out of the pod for the second time and the girl is watching him she moves her leg reveling panties. However, Seth comes over and they start intercourse. How? He doesn't even move her underwear to one side.
Other mistake: The credits for the movie say that they are in alphabetical order, but Peter Cullen is listed before Scatman Crothers.
Other mistake: There is a scene at the beginning of the movie where the two main male leads are walking near a frat house having a party. The shot with the error starts on a frat banner and then pans down and across to the female lead (Jill Whitlow) and stops with her in the center of the screen. At this point, her legs are transparent.
Other mistake: In the scene when the Kurgan breaks into the tower house looking for Connor, he breaks down the front door. As the door fragments, we can see it is not made of wood but polystyrene.
Other mistake: In the scene where Howard falls asleep in Beverly's apartment window and his wallet falls out, she takes out the money. The city on the bill says Washington DC instead of Marshington DC. (00:19:00)
Other mistake: As Packard backs out of the cemetery there's no damage to his car, despite crashing through an iron fence and headstones.
Other mistake: One of the taglines for this film was "Meet Jim Ferguson. He lived a daring double-life with one foot in the 20th century and the other in World War I." World War One was fought in the 20th century.
Other mistake: Hendershott fires the L.A.W., then gets killed. Nobody reloads it, but Wanda fires it at the beer truck as she dies.
Other mistake: Lakella seems to disappear from the movie after the battle.
Other mistake: Walter Paisley is cleaning the floor and encounters the first robot. The whole reason the robots are patrolling at this point is that the shopping centre is supposedly closed to customers, as it is nighttime. However in this scene you can see quite a few people shopping on the upper tier of the mall above Paisley.
Other mistake: When the family is leaving and the door is shut you see the floor lock (common in older homes) on the door engage. When Brad goes back in through the window you see him run down the stairs. He gets to the door and unlocks 2 locks on the upper part of the door but not the floor lock.
Other mistake: When examining the craft in the hangar, it's reported there are no seams or any way in or out, but when the camera focuses on the man's hand, you can see the seam where the hatchway will be.