Early in, where Wagner is talking to Bates in bed, just as she sits up her bedclothes in the 'side shots' cover her bosom area, but are down near her waist in the 'front on' shots, and then again. Covered, not, covered, not, covered.
When Zachary Scott's character 'Vic' first greets MacDonald Carey's character 'Hugh', he accidentally refers to Carey as "Vic".