Continuity mistake: While Allen is stuck in a traffic jam, several close-ups of Kornbluth show a yellow cab next to him. In the wide angles the car swaps to a dark coloured private vehicle.
Continuity mistake: When Allen is fighting with Kornbluth at the dentist, the position of the large lamp in the background changes between shots.
Continuity mistake: Freddie leaves the Penthouse magazine on a counter, where a woman behind picks it up. In the next shot, she picks it up again.
Continuity mistake: At the wedding, Freddie throws coins on the floor and Allen scolds him. The position of the kids and adults behind keeps changing drastically between shots.
Continuity mistake: When Hanks sneaks Madison out of the lab, his right arm is close to her chest, covered by a grey cloth. When the angle changes the arm is uncovered.
Continuity mistake: When Allen is brought home blindfolded and is interviewed by the press, two journalists without a camera approach from behind. In the front angle, a split second later, a TV camera appears out of nowhere.
Continuity mistake: The position of the dentist's tools on the tray changes between angles.
Continuity mistake: When Allen is in the water tank, before Madison is put inside, his fringe keeps changing between shots, despite him standing still.
Continuity mistake: When escaping from the MPS, Allen leaves Kornbluth alone on the street. The passers-by behind the car are inconsistent depending on the shot.
Continuity mistake: Kornbluth steps off the car to distract the MPs. When he kisses Madison goodbye you can see the wall behind has no basement entrance. When the MPs are about to run him over he jumps away and goes through a door that has suddenly appeared.
Continuity mistake: At the beach, Walter and one of the twins carry a box and are inches away from the boat. Half a second later, when the angle cuts to Allen asking the other twin, the first couple is standing behind, far from the boat, holding the same box and repeating the previous movements.
Continuity mistake: When Allen has dinner with Madison, his glasses of wine and water are far or close to each other, depending on the angle.
Continuity mistake: Freddie crashes his car against some wooden boxes. The way they are left changes in a matter of seconds with no one touching them.
Continuity mistake: When Allen first sees Madison on the beach, her hair is nicely crimped. But when she steps forward and kisses Allen, her hair is completely straight.
Chosen answer: Whilst it may be a tad unusual, each system serves as a back-up for the other.
David Mercier