Visible crew/equipment: At the very beginning of the scene where Alvy and Annie are arguing over Annie's adult education teacher, David, and Annie is getting into the cab, a film crew member is visible up the sidewalk, just above the roof of the cab. As the scene starts, he drops his arm as a timing signal to the old woman carrying a grocery bag to begin her walk into the scene, where, seconds later, Alvy turns to ask her a question.
Continuity mistake: After tennis, when Annie is driving Alvy uptown in her VW, she spots a parking space on the street and quickly pulls in behind a parked, driverless, red station wagon. Immediately, in the next shot, as they are opening the car doors to get out, they are behind a blue car.
Continuity mistake: Alvy and Max are walking down the street talking about (among other things) the fact that Alvy is on his way to meet Annie at the Beekman Theater. Alvy is wearing a black or navy blue T-shirt under his button-down flannel shirt. Shortly afterwards, when he's waiting in front of the theater, he's wearing the same clothes, but the T-shirt is now gray.