In the confrontation in the parking lot the crocheted hat Susan Anspach is wearing is positioned differently from when she gets out of the car and when she walks away from Blume.
Near the end of the film, Nina sits down at an outdoor cafe in Naples, then a metallic sound is heard and the camera shakes a little - as if something hit it.
When Cindy Chase is calling the swinging couple that she knows, a boom shadow moves along the lampshade.