Continuity mistake: When Vera is getting sucked into the computer, she has white gloves on. Seconds later, during her robot transformation, there is a full screen close up of her hand without any glove. Then, when Vera emerges from the wreckage of the computer a few minutes later, she has her gloves on again.
Continuity mistake: When the Olympic marathon runner holds the torch while running on the track toward the stairs, he has a large upper body build. Also, his shirt has a very noticeable logo that is lying right on his sternum. As he climbs the stairs we see him from behind and this is the last of the real footage from the Olympics. The actor holding the torch, that gets blown out, does not climb the stairs near as gracefully as the Olympic athlete. When they show him from the front, not only does he have very little upper body muscle, but his face is nowhere near the same as the athlete in the stock footage. (01:12:10)
Continuity mistake: After Evil Superman was done melting the mirror in the bar he slowly stood up from the stool to leave the place. The immediate next shot from the sidewalk right outside the bar shows a pedestrian approaching, and as he walks by the establishment Superman can be seen through the window still sitting down at the counter.