Factual error: The tail livery on the Concorde was not current in 1992, being first introduced in 1997. The curvy grey interior seats shown in Concorde were only introduced gradually from 1993 onwards; the film should have depicted square seating in 1992.
Character mistake: When Joan and Joe are first alone in their suite in Stockholm, Joe tells her he wasn't attracted to a woman. Joan says, "I could care less." There's no way a college-educated writer (married to a Nobel laureate in literature) would use that phrase. The correct phrase is "I couldn't care less."
Factual error: The Lincoln limousine in which they are riding in Stockholm in 1992 appears to sport a modern day Missouri license plate.
