Goofs

When Laura (Christina Ricci) is putting plates in the cupboard, there are two pink plates left. In the next shot, there are three plates left.

Laura's boss tells her he needs the new form DM40 on his desk in an hour, but in the next scene, when she's reading aloud to herself from the employee handbook, she calls it the DM4.

When Christina Ricci is scrubbing the counter near the film's beginning, she is using a scouring sponge that didn't exist until the 1980's.

Actually not an anachronism, as it is revealed towards the end that she was only fantasizing a "perfect" 50's era world, and is actually really in modern times. It is one of the many subtle hints that something is not as it seems in her world.

When the grandmother (filmed from behind) says the line, "It was so much simpler back in my time," her mouth doesn't move with her words at all.