Continuity mistake: When Mrs. Walsh shows Rosalita the house, the attic door is open and we see that it opens at the left, with the wallpapered wall behind it and nothing in front of it except the banister. When Brand opens that door and the boys rush up, we see the wallpapered wall behind it, only this time the attic door opens at the right. (00:11:25 - 00:13:50)