(at around 23 mins) The character who pulls his own tongue out, cuts off his own nose and then shoots himself quite clearly still has a full nose just before pulling the trigger.
(at around 1h 4 mins) When the Djinn draws his sword in the fight with the Hunter, the first sword has a blue gemstone similar to the Hunter's. However, the sword the Djinn continues the fight with has a red stone in its hilt.
(at around 23 mins) There is no evidence of bloodstains on the faxed documents.
Lisa and the Djinn have sex on the couch. But at no point is Lisa ever seen taking her clothes off.
(at around 49 mins) When Sam finds his old drawings, the picture of Lisa that he drew three years previously changes between shots.
(at around 1h 2 mins) When the Djinn, in human form, is waving a stick and taunting the hunter, you can see a crewmember in blue on the left of the screen, in front of the tree. On the next shot of the tree, he's gone.
Lisa never experiences visions anytime a wish is granted and someone dies. The Hunter states that the Djinn is hiding his true form from the waker which would explain why she isn't aware of his presence, but if the Djinn can hide his presence from a waker to get easy access to them and trick them into granting wishes, why didn't he do that in the previous films.
It has been established that the Djinn can only copy a person's identity if he takes their face, as he does with Verdel, yet when he's confronting Lisa and Sam in the final act, he can take both their forms without having claimed their faces.