Deliberate mistake: In the scene where the ministers are all crammed into the train carriage if you look over Jim's shoulder there is a sign ("Notice" "In case of Fire" etc), while the headers are in English the actually paragraphs are written in gibberish.
Deliberate mistake: While Magnum is with Penelope at the cemetery Magnum spots a man standing by the tree, and when Magnum walks over to stand beside Penelope, this shot is flipped. (00:32:55)