Continuity mistake: When Keaton is talking to the plumber outside her house about the price of replacing her pipes, keep your eye on the van door. It is open, then closed and then open again.
Continuity mistake: The movie covers a period of at least a year, but the baby stays the same age throughout.
Continuity mistake: When JC and the baby arrive at the apartment for the first time, she drops the diapers at the inner doorway. In the next two minutes the diapers and the other items in the corner mover several times. (00:07:00)
Revealing mistake: When the plumber is climbing out of the very snow covered well, the snow on top never shifts - an impossibility considering the actor's size and weight. The snow on the ground moves as expected. (01:05:10)
Continuity mistake: At the end of the film, J.C. comes home to her daughter, Elizabeth. After she picks her up and takes her to the rocking chair, J.C. is about to sit down and crosses her legs. Then in the next shot, she's rocking the chair like she's been sitting there for a few minutes already.