Continuity: After Col. Rolland plays the tape revealing the identity of the traitor, a minister walks from the room and passes Rolland who has one hand on his forehead. Cut to a rear view and now Rolland has both hands on the tape player.
Continuity: When the Jackal is parking his car near the hotel, he parks in a small gap between two cars. When he gets out of his car, the leftmost car is gone.
Factual error: When the Jackal is driving into France in his 1963-correct Alfa Romeo Giulietta, he passes a red Alfa Duetto. Those were not made until 1966.