Continuity mistake: When Epps first walks into Katie's cabin, there is a straw hat underneath a suitcase on top of the clothes rack. Yet when Epps gets up again after looking at the dress, the hat is now on top of the suitcase without her having moved it. (00:53:40)
Continuity mistake: When the demon meets the crew in a bar and asks them to find the lost ship he saw from the air, notice the beer bottles on the table; they keep changing from full to half full to full again, mainly the foam at the top. (00:07:55)
Continuity mistake: In the scene abord the Arctic Warrior, the engineer is in the engine room rebuilding the engine, and he gets oil squirted on his right cheek. A moment later, the oil has moved to his left lapel and shoulder. (00:30:15)
Continuity mistake: When Jack ask Sean if he can talk to him alone for a minute, you see Jack lift his hand up pointing back with his thumb. Then he lowers his hand again. When it cuts you see Jack still holding his hand up. You also see Epps reaching in her pocket with her right hand, and when it cuts she is suddenly holding a cracker. (00:07:20)
Continuity mistake: In the beginning, when the crew is dividing their money, the number of beer bottles on the table increases between the shots. At first, there are a few half full bottles. Suddenly, there are a few full bottles and a few empty bottles, with no time to have drunk them. (00:06:55)
Continuity mistake: In the scene where Epps is looking at the swimming pool, when she falls backwards from seeing Katie at the top of the stairs, there is a safety ring at the bottom of the pool. Yet later on in the film when Katie is showing Epps what happened to the people in the ship and how people were shot in front of the pool, there is no ring. (00:32:25)
Continuity mistake: In the scene where the people are dancing and later killed by the line you can see the glass is still standing after it was cut. (00:04:25)
Continuity mistake: When Francesca is messing with Greer, his shirt says "Everlast" on it. After he falls down the shaft, the word is gone.