Other mistake: The traveling camera used during the opening credits is not positioned correctly; it is tilted to the right, causing the whole scene to be crooked.
Other mistake: When Lulu is looking at herself in a three sided mirror as a monkey, the reflections do not match up with her position of her hands. Most noticeably with the reflection on the right side. (00:05:40)
Other mistake: When Anna and her fiancee arrive for tea, the fiancee is put in the living room while Anna and Lucy, in the kitchen, talk about the ghost; as they leave the kitchen, Anna heads right, which is wrong - the living room is to the left.