(at around 1h 13 mins) During the party scene, a woman wearing a green dress can be seen lying dead on the floor, a few scenes later we can see her alive and running out of the house with the crowd.
(at around 18 mins) Early in the movie a phone booth is shown with the Pacific Bell logo. After Alexandra wishes to be back in her apartment (at around 55 mins), the phone rings and a camera shot of the phone shows a Bell South logo.
(at around 26 mins) When the bum throws down his cigarette outside the drug store it is unlit. When the Djinn picks it up, it is lit.
(at around 1h 17 mins) Towards the end of the Beaumont party scene, Alex and the security guys are in the hallway with the killer statues. One of the security men falls to the floor and his earpiece falls off. Throughout the scene, it keeps changing position from being on the floor next to him, to back on his ear, to being on his ear in a different position.
(at around 11 mins) When Josh and Alex sit down after their tennis match, Josh's tennis racket vanishes from his hands between shots.
(at around 1h 17 mins) Security is trying to help Alex escape. Each security guard is using a semi-automatic pistol, and when the clips are empty, the gun is heard to be making a double click sound. No semi-automatic pistol will make a double clicking noise when the slide is drawn back, as these are shown to be, when the clip is empty.
They keep referring to the gem, which is an obvious garnet as an opal.
(at around 22 mins) As the camera pans down the front of the Seaside Pharmacy, on the left you can see the actor playing the bum waiting for his cue to walk across the screen.
When the killer statues are going on their rampage, one of them stabs a guard who's fallen on the ground. Immediately after, you can clearly see the skin of the actor playing the statue through the mouth hole of their mask.
At about 1h 11 mins, the tearaway appliance on the man's face is visible before the glass shrapnel even hits him.
(at around 37 mins) During the wide shot of the park/play house you can see the camera crane's shadow in the bottom right corner.
The intro states that "to the people of ancient Arabia, the djinn was neither cute not funny," and at least once during the movie the djinn makes reference to Arabia, but the scene in the beginning where the djinn is imprisoned takes place in Persia. Persia and Arabia are used interchangeably in the film on multiple occasions when in reality they have never overlapped. None of the Persian empires ever included the Arabian peninsula.
(at around 49 mins) Merritt makes two wishes - for his statue to become more valuable, and for money, both of which the Djinn grants. However, with the exception of the waker, the Djinn can only grant one wish per person.
(at around 47 mins) When the security guard orders the Djinn to leave, he goes away with discontent, but then the guard says that would love to see how Djinn'd go through him. Djinn fulfills the desire. But this is impossible, as ordinary people have the right for only one wish. The first was fulfilled when the genie was gone. To go through a security guard - is the second wish.
(at around 1h 6 mins) When Alex answers the Djinn's phone call after being wished back into her apartment, she screams into the phone, but does not press the "talk" button beforehand.