Revealing: Nuclear Man is shown blowing up the Great wall twice, but it's the same shot reversed. Submitted by Sacha

Continuity: When in the subway, Superman is standing by a 6 foot poster of the Statue of Liberty. When the shot changes to a flying Superman, he is a third of his size and the poster is huge. Submitted by Sacha

Revealing: The rock that hits the prop-astronaut blows his head off. Seconds later the head is back in place. Submitted by Sacha

Continuity: The cab's hood, crumpled by Nuclear Man's power beam, magically smoothes itself a frame later. Submitted by Sacha

Continuity: Nuclear Man lands on a street surrounded by skyscrapers. In the following shots where he destroys everything, the right side of the street is the same, but the left side is totally different: small houses, sunnier, signs on the walls. Submitted by Sacha

Continuity: The bundle that Superman makes to destroy the weapons changes to a tenth of its size in about a second. Submitted by Sacha

Continuity: When Superman and Nuclear Man fight on the balcony the high powered binoculars disappear. Submitted by Sacha

Visible crew/equipment: In the quarry, when the cops' car flies up the air you can see the ramp used to lift it on the lower left side of the screen. Submitted by Sacha

Revealing: When Clark Kent enters the subway, the set is the same as the rampage later in the film; only that the second time we see this set, the subway entrance has vanished. Submitted by Sacha

Continuity: During the volcano eruption the animal on the right (goat or sheep, I don't know) keeps changing from brown colour to white. Submitted by Sacha

Continuity: When Lacy is about to enter the elevator, a light brown rug has appeared on the floor behind, which disappears in the next wide shots. Submitted by Sacha

Deliberate "mistake": The same front shot of Superman flying is used over and over and over again. Submitted by Sacha

Continuity: Clark enters the barn to fiddle with his green crystal. When he exits, a huge amount of stuff from his childhood has magically appeared around the place. Submitted by Sacha