Continuity

In the first scene in the doctor's office, Clarkson's wristwatch reads 10:35, but Schneider's reads 12:15.

Factual errors

The version of the Talking Heads song "This Must Be The Place (Naive Melody)" played at the party was never released on vinyl. The version played in the film is a live version recorded for the Stop Making Sense album but only appears on a Special Edition CD released many years later.

Revealing mistakes

At the party, when the host puts on a vinyl record, she drops the needle on the first track on the side. But the song that comes out of the speakers is "This Must Be The Place (Naive Melody), which is the last song on the Talking Heads album, "Speaking in Tongues." As the last track, it would appear closest to the center of the album, rather than at the outside edge where the needle is placed. In fact, it has never appeared as the lead-off track on any vinyl album.

Continuity

At the first dinner with Lars and Bianca, the glass of milk Lars is drinking suddenly appears on the opposite side of his plate when he begins cutting Bianca's food.

Continuity

When Lars is handed the flower after church, he has it in his right hand just before turning around to see Margo. After turning to see Margo he quickly throws it away with his left hand.

Continuity

In the bowling scene, when Margo hits the pins, they all fall down. When the shot is returned to her, two pins in the left hand corner are left standing. Then when the shot is return the third time, all the pins are gone again.