When Clark Kent is shot be Caspar, the guy fires two shots, but then afterwards, Mr. Rockwell claims one bullet was stopped by the lead plate. What happened to the other bullet ? It would be in probable to have two bullets strike the exact same spot and no one comments that there are no holes in Clarks suit. And a single lead printing plate would not stop a bullet.
When Superman re-crushes the crystals back into a diamond, it some how gets back into a round and perfectly cut diamond.
When Superman jumps from the floor up to the mantle over the fireplace his cape moves upward, clearly revealing that the film was run backward.
Superman takes, crushes, and then reconstitutes Van Cleaver's diamond. Later, Jonas tells her the diamond is a fake. Superman would have known the material was not an actual diamond as it would have been destroyed by crushing and could not have been reassembled.