@ around 33 minutes when Bernice is talking to Dolly Bernice's champagne glass is in her right hand. Just before Bernice gets up out of her chair she gestures to Dolly with her empty left hand, yet in the wide shot when she stands up she is using her right hand to help her get up and the champagne glass is now in her left hand.
When the babysitter is putting the baby in the crib, as she first stands there holding it, you can clearly see by the stiff limbs that it is a doll. The next cut, with the camera looking in past her shoulder, does show a real baby.
The police manage to find their way to the Tucker's house at the end of the film even though Jimmy didn't give his address to the operator.