Visible crew/equipment: When Vee asks how Tommy knows so much about the game, a very nice camera shadow can be seen on the car seat. (00:12:50)
Continuity mistake: When Fujiwara greets Hideko after arriving at the mansion, Sook-Hee is shown in the background when Fujiwara approaches Hideko, walking over to the doors and closing them. It then cuts to Hideko and in the background of the shot, we can see a mirror with Sook-Hee's reflection shown, where she is standing back to her original position, completely still and doing nothing. (00:25:07)
Continuity mistake: When Holland shows the bartender the dollar bill in the shape of a shirt, he is smoking a cigarette before he takes the cigarette out of his mouth. Holland mentions to the bartender that he made it himself, with nothing in his mouth, but in the next shot, the cigarette is suddenly back. (00:09:45)
Continuity mistake: The cursed necklace is shown emitting its evil fumes on the white paper of the letter, but the letter itself is perfectly 90° with the envelope, or at a different angle. (00:06:20)