Corrected entry: While Luke is putting plastic on the window, you can very briefly see a crewman outside.
Corrected entry: When the children call Nell in the middle of the night, she finds bloody footprints on the floor. When she follows the footprints with her eyes, some of them are on the wood floor, some are on the carpet. But when she actually follows them step by step, the carpet's ones are missing.
Corrected entry: At the scene where Eleanor is alone in the huge room, some really big rock comes out of the area where the bones are buried. When a head swings through that area later on in the movie, she says "That's not what I saw." Did that huge rock just disappear? Where could such an enormous rock go?
Corrected entry: When Eleanore sees the ghost in the window, she chucks a large metal box. It breaks the window and the ghost spits all the razor sharp shards of glass back at her. She is hit, but later on she is not bleeding or complaining about pain.
Corrected entry: When Dr Marrow goes to rescue Nell to the top of the spiral stairs, at the end of the scene, they leave the greenhouse through a door on top of the stairs. It would have been much easier for him to go rescue her from the top, while Theo and Luke talked to her as a diversion to avoid her from throwing herself off.