Corrected entry: Marlon Brando was offered the opportunity to reprise his role as Jor-El from the first film, but he was unwilling to reprise his role for this film. As a result, we only see his hand at the beginning of Superman II, and we see only Superman's mom in the recap footage from Superman. Later in the movie, we only see Superman's mom in the crystal recordings for the same reason.
Corrected entry: Shortly after landing on Earth Ursa picks up a snake which bites her. In obvious pain (since she has never seen a snake and therefore would not expect a snakebite to hurt) - she throws the snake to the ground and lights it on fire with her eyes. However, once on Earth Ursa has the same powers as Superman and since a snake could not hurt Superman, why can it hurt her?
Corrected entry: After Clark Kent learns about Zod in the diner and after he was beaten up by that guy in the diner, he realizes that he must get his powers back. So, he walks all the way from the diner to the Fortress of Solitude, a distance of several thousand miles. With no food, no water, no transportation, no money, and just a coat, he manages to walk through miles of snow, ice, and freezing cold to get to the Fortress of Solitude. How does he do this? I don't think any human being could pull this off, and at this stage that's just what he is.
Corrected entry: During the scene in East Houston, Idaho, when the three phantom zone criminals are terrorizing the small town, there are several vehicles that are seen as random vehicles about town. Specifically there is a white 1970 Mustang hardtop, a blue 71 Mustang hardtop, a white 71 Mustang fastback, a red 1972 LTD and a brown and gold two-tone 1970 Javelin. Each of these vehicles is then later seen in the 'Metropolis' street scene when Superman is fighting the three criminals. In addition, the red LTD looks suspiciously like the red LTD that Lois drove in the finale of the first 'Superman' movie.
Corrected entry: When the H-bomb explodes in space, you can see the explosion happen behind the intact bomb, instead of originating from it.
Corrected entry: In the beginning of the movie, Clark Kent is hit by a taxi cab when crossing the street. The taxi cab is severely damaged in the front, but Clark keeps walking across the street. Look at the damage made on the cab. Where's the damage on Clark's suit or pants? The material used in his working suit must have been as strong as the material used in his Superman suit.
Corrected entry: Just after Lois grabs the branch in the river, she is upstream of the branch in one shot, and downstream the next. In these same two shots, the branch goes from being perpendicular to the water's flow to being parallel to it. (00:48:45)
Corrected entry: It seems strange that it is business as usual when there are so many explosions, let alone it is night time and everyone is wearing business attire.