Factual error: Jimmy tells Clark that Luthor was freed from jail because Superman didn't appear when the Court of Appeals called him as a witness. Court of Appeals rulings are based on the facts in evidence from the previous trial, and nothing else. No new evidence or testimony is allowed.
Factual error: The shuttle attachment to the plane is wrong - the shuttle undercarriage would not be part of the fixtures. Not only that, when we see the undercarriage raise into the shuttle there are no wheels, so the shuttle would not be able to land upon its return, also the the undercarriage poles change shape before and after release.