Corrected entry: When Jennifer gets killed, it looks like as Roman stabs her, the two kinda press against the glass covering the closet. As Dewey shoots the glass, Jennifer falls through the glass, yet the killer is nowhere to be seen. It looks like to the right, there is a wall there, preventing him from running in that direction, yet if he ran the other way, he would have ran right in full view of Dewey and Gale. Instead, he's just magically disappeared.
Corrected entry: Towards the end of the movie when the killer confronts Sidney, she shoots him 6 times leaving a crescent of bullet holes in his costume, but the next time we see him the holes are gone. Later, when he reveals himself he shows Sidney his Kevlar vest and the bullet holes are back.
Corrected entry: In the scene where the cast are hanging out in Jennifer's house with Gale and Dewey, the door opens by itself and Dewey points his gun out the door. When he calls out the names of the actors, watch the wall behind him and Gale, you can see a shadow of a cast/crew member on the wall.
Corrected entry: In the scene where all the characters are together in the house and they smell gas, the power goes out, but the fax machine is working pretty well.
Corrected entry: The "Movie Gale" learns that she gets killed next, based on the idea that the killer is going in the order of how they get killed in the script. That means that Gale Weathers dies in Stab 3. But when the "Movie Gale" gets killed behind the 2-way mirrors, you can hear her say that she is the killer in Stab 3.
Corrected entry: When everybody is at Jennifer's house and the killer starts sending them faxes, the power is cut and everyone runs outside. But a few seconds later, when one of the guys runs back in, the fax machine is still going, even with the power out.
Corrected entry: Towards the end of the film (after we've established that the killer is wearing a bullet-proof vest) why does Sidney bother to stab him in the chest? It's not as though she's forgotten because she then tells Dewey to shoot him in the head! (01:45:24)
Corrected entry: In the scene where Sidney is in her old house on the set, and she opens the door and almost falls out, then she looks down there is no bed down there, then the killer comes running in the door and she throws him down and then all of a sudden there's a bed...
Corrected entry: I think a few of the characters seem to have forgotten the 2nd victim in the opening scene. References are made to "Two dead people" when there were three and "three and a bodyguard" when there were five dead at that point.
Corrected entry: When Dewey is shooting at the one-way mirror he fires seven shots form a revolver (they only hold six) then he fires again without reloading and is surprised to find it empty.
Corrected entry: Dewey said he took Sidney's file but it was on the Detective's desk.
Corrected entry: When Cotton is driving home to save his girlfriend he passes an advertising poster, on which is written, that Cotton's own TV show "100% Cotton" is shown weekdays at 3.30 p.m.on television. But when he has reached his house you can see the TV screen on which Cotton's show is on, although it's definitely too late for 3.30 p.m.(It's dark outside, maybe 8 or 9 o'clock.)