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: 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.
Continuity mistake: Allen arrives to the market dancing and juggling potatoes. Behind Freddie there's a man scratching his nose. In the next shot his hand is down and he is raising it to scratch his nose again.
Continuity mistake: When Freddie, as a kid, is in the boat throwing the coins, a man in the background on the left side appears several meters to the right in the next shot. The second time he throws the coins, a guy next to the flag disappears between shots.
Continuity mistake: Before Allen asks his secretary if anybody called, she holds a yellow paper at chest level. Half a second later, when the angle changes, the paper is down and she is raising it again.
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: 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: The position of the dentist's tools on the tray changes between angles.
Chosen answer: Whilst it may be a tad unusual, each system serves as a back-up for the other.
David Mercier