Continuity mistake: While breaking down the bathroom door with the axe, Jack repeatedly strikes and damages the right hand panel, but as he turns away from the door (when he hears the snow-cat) both left and right panels have been damaged.
Continuity mistake: In the original 1980 version, in the first wideshot of Darth Vader's Star Destroyer, the light of a Star Destroyer can be seen on the right side just flying through space. This is fixed in the 2004 DVD release.
Continuity mistake: When the windows on Nick's truck are smashed, Elizabeth has protective gloves on when she covers her face from the glass, they are then gone when the truck comes to a halt.
Continuity mistake: After Brenda hears a noise, she puts her book down next to the candle, and walks to the door. When she gets to the door, the book is now by the opposite side of the candle. (00:52:50)
Continuity mistake: The egg timer in the jail is about to run out, but when Dale runs over to it and tries to turn it over, there is more sand in it than before.
Continuity mistake: The amount of blood on Kate's face decreases between the time she is attacked and discovered. The pattern changes from shot to shot as well. (00:34:15)
Continuity mistake: During the placing and arming of the explosive probes, twice the probe being placed is a completely different number to the one that is then promptly armed.
Continuity mistake: When Adam switches on the monitor to view Hector trapped in the lab, Hector is seen ripping a piece of the door off. Adam then asks Benson about emergency procedure. When the shot cuts back to the monitor, Hector is ripping the same piece off the door again; it's the same footage. Also, when the three humans force their way into the lab afterwards, the damage done to the door is not the same as they viewed on the monitor. (00:45:25)
Continuity mistake: At the beginning of a bedroom scene, Elizabeth Taylor breaks a mirror. Later on in the same scene, she sits down at her dressing table, and the mirror is back in place and unbroken.
Continuity mistake: When Julian Kay is tearing apart his Mercedes to look for the stolen jewels, he is seen pulling some plastic off the driver's door, in the next shot, you can still see the plastic attached to the car door.
Continuity mistake: When the seance begins, there is a glass on the table that moves around from shot to shot. (00:45:39)
Continuity mistake: At the beginning during the house gathering, the toilet seat is up while Arthur is gathering ice from a bag that is in the bathtub. We cut to a shot of Emily and then back to Arthur, where the toilet seat is down. (00:06:40)
Continuity mistake: Kenny must be fast. He's disguised as the female assistant at one point then minutes later he's disguised in the Groucho Marx costume.
Suggested correction: It's not a full costume. Kenny steals the mask and what looks like a small waistcoat (leaving even the hat). It's not implausible that Kenny made a quick change (probably after killing Ed) to formal wear (which isn't what Ed was wearing). After Ed's murder, Kenny-as-Ed appears briefly only from the waist up (showing only the stolen mask and waistcoat), and then doesn't appear again for quite a few minutes, more than enough time to change to the formal wear.
Continuity mistake: The amount of blood in the shower varies from shot to shot. One moment, it's ankle deep, then the drain is visible, then ankle deep again.
Continuity mistake: In the very last scene, Hoskins opens the back left hand passenger door. He gets in, and is seated right on the edge of the seat (as far left as he can go) when the car takes off, and Brosnan pops up and aims a gun at Hoskins. Hoskins does not move. However, from the camera angle, Brosnan is pointing a gun at the middle of the row of seats, whereas Hoskins is sitting on the far left.