Other mistake: When Snake is injected, and his timer is set to 23:00, Hauk tells him the glider is waiting. The next scene has Snake getting into the glider, but when he radios in, Hauk says there's 21 hours left. Snake was pretty upset that he didn't get a full 24 hours; knowing his life is on the line, why would he take 2 full hours to walk out the door and over to the glider that was waiting for him?
Other mistake: At the end of the movie, when the President puts the cassette tape into the player, the printed text is upside down on the player. The model is a Sanyo MT4200, which was an unusual unit; it had a TV on the side, and the dual cassettes on the top. But as we see his hand 'drop' the tape in, it must be on its side - there is no reason for it to be on its side, and no reason for the cameraman not to have turned it around so the text was right-side-up.