When Emma first goes into the attic her hair is black. At all other times it is brown.
While John Savage is talking at dinner, a half empty salad bowl is right in front of him. The camera angle changes to a long shot. A full salad bowl is now in front Catherine Mary Stuart. Savage asks her to pass the salad. Now it is a full bowl.
After Emma hits her head on the stove in the kitchen, we see her father wiping her forehead as she lies on a couch. As he pulls the cloth away, we can see there is blood on it, however; there is no wound or mark at all indicating a place where the blood could have come from.