Other mistake: When Tod is going outside to see a statue of himself, as he gets closer to the door he runs into it, but he actually jumps at the door.
Other mistake: When the last soldier that is seen killed by the light grenade lowers his hand to pick it up, you can see the grenade already in his hand before it goes off camera.
Revealing mistake: Toward the end of the film, there's a scene were Dick hits a Spango soldier and Dick shakes his hand in pain. If you look over his right shoulder, you see two people fighting but there's no physical contact being made.
Deliberate mistake: When Marge and Dick are being beamed in outer space, there's no way they could be breathing because there's no breathable air in space.
Other mistake: In the scene where the soldier picks up the Light grenade to show the others, look to the left side of the scene. You can see a person look out of one the tents and quickly go back in.
Audio problem: In the beginning of the film, When Tod says "So me this woodland hills" watch his mouth, what we hear doesn't match what he says.
Visible crew/equipment: In the behind shot, when Dick runs left of screen, the mushroom type creature jumps at him. You can see the arm of the puppeteer that is controlling the puppet.