When the caretaker gets out of her car with a bag of groceries, she has a carton of eggs in the bag. When she enters the house, there are two cartons.
When the characters are playing cards, the cards on the table change randomly depending on the shot, without any reasonable connection to the actual game and/or previous shot.
When Elva is sitting in her car at the cemetery, there's a man's face visible to the left of her head, reflected in one of the car windows, and then it's replaced by a hand twisting something. It is unclear what is being twisted, since the camera isn't moving at the time.