Revealing mistake: Near the end of the film when the wife is running a bath, Michael Douglas is down stairs making tea. As he walks in and out of the living room, in the background there is a curtain that is drawn open but there is no window.
Continuity mistake: When Michael Douglas pretends to be hurt in the field, Glenn Close says, "My father died of heart attack," and she has a long earring dangling from her right ear. In the very next shot it's gone. (00:27:05)
Continuity mistake: When Michael Douglas is listening to a "deposition" (which is really Glenn Close calling him names, etc.) using his ear phones in his new attic home (just before his wife comes up and finds him), the audio tape is not the same one as he was listening to minutes before in the car! The words are almost the same but the inflections are different.