Factual error: In a short scene, Sissy Spacek is seen walking down the sidewalk with a 16 ounce cardboard cup of coffee with a cardboard cup holder. The film is set in the mid 1980s, well before regular people walked around with coffee shop coffee in a cardboard cup.
Factual error: There is giant Altoids display at the grocery store counter in the scene where Sissy Spacek sees William Mapother. The film is set in the mid 1980s - Altoids' massive marketing campaigns are a more recent event.