Other mistake: When Sam Flynn first enters the arcade, he goes to a breaker box on the wall. When he opens it, the breakers are already in the "ON" position, closest to the center. He actually turns them to the "OFF" position.
Other mistake: After Dan is killed by wolves you can see his corpse is covered by snow, only his hand is showing. When daylight arrives, you see that all the tracks on the slopes are still visible, and big patches of brown can be seen even though it's supposed to have been snowing at least 30 cms, enough to cover a human body.
Other mistake: In the last scene when Jeep, Charlie, and the baby are driving off, the gearshift of the truck is located in "park". That is located at the topmost point of the gearshift's travel.
Other mistake: Kim is putting Sally back in her own bed at night to sleep however the window shows daylight. (00:47:56)