Continuity mistake: In court before the Detective testifies, there is a big open space right in front of both the Stand, and the Jury Box. When Sonny shows the detective the crime scene photos in the very next scene, there is a huge wood table in that space. In fact, Sonny even sits on it when talking about Shelton the Cat.
Other mistake: When Kevin Spacey is lying on the carpet after having been killed by Jude Law's ghost, there is a very strange shadow visible to the left of the picture which looks as though it is someone standing there with their hands on their sides. There is nothing in the room to suggest that this is a shadow of a bust or a reflection of anything.
Continuity mistake: When John and Jim take Uga for a walk a lady asks to have a photograph taken of her with the dog. Before John takes the picture kneeling down he puts his bag on the ground. When he gets up he hangs the bag over his shoulder. In the next shot it's in his hand again, before he hangs it over the shoulder a second time.