Just prior to finding the doll on the stairs John goes down stairs for a class of water wearing an open bath robe with no shirt. When he fills his glass you see him from above wearing a shirt and then no shirt when he finds the doll.
Early in the film a female character is collecting blackberries outside in the garden. You can clearly see from the foliage on the trees and from the bluebells that this movie is filmed in Spring. Blackberries would not be on the bushes until the Autumn,
Shortly after meeting Cassie, John searches a lady's bedroom. As he steps towards the nightstand, a crew member can be seen reflected in a picture to John's right. For a brief moment afterward, both John and crew member can be seen.