Continuity: When Matt Damon and Marie begin to kiss in the hotel room, his wristwatch is on his right wrist; when the camera angle changes and they are still kissing, his wristwatch has mysteriously changed to his left wrist. Mirrors aren't involved - while there's a mirror in the bathroom, we see too much of the room in all of the shots for it just to be a reflection.

Plot hole: In Paris, why does the assassin go to the ridiculous amount of trouble of swinging into the room on a rope with a machine gun when he came in from the lobby (as proved by the dead woman downstairs)? Alternatively, if his intention was always to surprise Bourne by coming in through the window, why venture downstairs at all?

Continuity: This is the scene where Jason is on the fire escape platform in the embassy in Zurich. Before he goes down below the platform we see that the platform is cleared of all the snow. Then moments later, when security guard opens the door and Jason is under the platform, the top of the platform is fully covered with snow again.

Continuity: When Bourne gets the box from his numbered bank account, the bank clerk carries it by holding its handle. Then he puts it on the table tipping it over to the side, so Bourne can open it. Thus the ingredients (especially the heavy weapon) should all be laying on the right side, what used to be the bottom of the box. But when Bourne opens it, everything is nicely arranged.

Continuity: When Wombosi is assassinated by the other agent he is shown walking down the stairs with glasses on and a turtleneck sweater. He also has another man following him. Then the next shot shows Wombosi (or a stuntman) standing in front of the window with a leather coat on and no glasses. He is obviously not walking anymore and the man behind him is nowhere to be seen.

Factual error: Throughout the movie, there are countless references to the incident early in the movie at the U.S. Embassy in Zurich. Neither the U.S. nor any other country maintains an embassy in Zurich. The capital of Switzerland is Bern. Since most of the characters in the movie work for the U.S. government, they would surely know the difference between an embassy and a consulate.

Continuity: When Bourne approaches Marie about a ride, they talk across the top of her Mini. First, there is lots of snow on the car's roof. Then, there isn't.

Continuity: When Bourne blows up the tank at the farmhouse, the wide shots show a solid wall of black smoke. In the closer shots there's nowhere near as much. The smoke in the first shot must be coming from the explosion, and in the closer shot we're looking right at the destroyed tank, so it can't be due to different angles.