Continuity mistake: When the teens enter the mental institution to get the dream suppressant drug, it shows a security guard drawing his pistol in alert to an intruder banging on a door. The next shot cuts to show the response of two teens hearing a single shot fired, and then cuts back to show the security guard under the door with four big dents from Jason and two bullet holes. The holes are located at the top right hand corner of the door and the other near the door handle. (00:56:20)
Continuity mistake: On the deck, after the girl flashes, the way she holds her top to cover her cleavage changes between shots. (00:02:50)
Plot hole: Linderman didn't know who Jason was after the rave massacre, calling him a "psycho in the hockey-mask", but later in the film when Stubb's is telling them (Will, Lori, linderman, Freeburg and Kia) about thinking Jason is a copycat, Linderman suddenly acts like he knows who they're dealing with when he didn't before. "I've seen what he can do, he's the real Jason."
Continuity mistake: When the guards leave after sedating Mark, Will gets up in his bed and we see his pillow's askew. When it cuts his pillow is straight. (00:22:35)
Continuity mistake: When Lori explains she haven't had much sleep lately, Kia says "Lori, you had to sleep at the police station.". If you look at Kia's purse's straps you can see some of Kia's dress sticking up between the straps. When it cuts the piece of her dress no longer sticks up between the straps. (00:26:15)
Continuity mistake: In the fight scene on the pier, just after Freddy has sliced off Jason's fingers, Jason blocks the machete, Freddy slashes him with the glove and then cuts Jason's chest with the machete and raises the machete for a downward blow. They are now standing face to face. However, when Freddy makes this cut, Jason's back is all of a sudden turned, enabling Freddy to cut his leg from behind. There was no time for him to turn around between cuts.
Revealing mistake: In the final fight scene where Freddy and Jason are outdoors, Freddy gets his leg caught in a rope and is hung upside down. This causes his pant leg to rise revealing an unburned limb, which obviously was not covered with make up. (01:19:25)
Continuity mistake: In the scene when Kia and Gibb meet Lori outside on the school bench after Trey's death look a few moments later, you see a close up shot of Gibb putting the cigarette towards her mouth and almost reaches her lips, in the very next shot Gibb has the cigarette down in her hand and then a second later she then puts it to her mouth. (00:25:10)
Continuity mistake: When Freddy, disguised as Mark's brother, approaches Mark saying he's gonna send them a message, the dirt on Mark's face differs between the shots. (00:49:05)
Continuity mistake: When Lori, Kia and Gibb meet and they hug each other, we see Kia putting her arm on Gibb's shoulder. When it cuts Lori's hand is on Gibb's shoulder and Kia's hand is on Gibb's back. (00:24:40)
Continuity mistake: When Mark turns up at school telling about Freddy to Lori, as he says "Then he came back" we see Lori pulling her hair back with her hand without lowering her hand. When it cuts, her hand is suddenly down. (00:27:05)
Revealing mistake: After Jason has killed Stubbs, we see all the kids in the room looking for Hypnocil. Then we see Stubbs being 'thrown' through the door. However we can see the stunt double come running before going through the door. So he isn't actually thrown. (01:00:10)
Continuity mistake: When Freddy's shadow impales Blake, you see Blake running off the street. When it cuts you see Blake running off the street again in the background. (00:18:55)
Continuity mistake: When Mark is telling about Freddy to Lori we see her holding her ears, then as Will appear, she takes her hands off her ears and lower her hands. When it cuts back to her she is still holding her ears, then she lower her hands again. (00:27:20)
Continuity mistake: When Jason crashes through the cabin wall and slashes the teen, a crate on Jason's right foot alternates from being on / off between shots.
Continuity mistake: When Kia removes Jason's mask we see Linderman holding on to his knee with his finger out. When it cuts his fingers are clenched. (01:10:05)
Continuity mistake: When the skinny-dipping girl reaches the ladder attached to the pier, you see her grab it with her left hand. When it cuts she holds on to it with her right hand. (00:03:25)
Continuity mistake: At the institution when they find the coma patients, Will picks up some papers from the patient's charts. The way Will holds the papers differs in the shot when Lori says "Who would do this to people?" (00:57:05)
Revealing mistake: At the final battle scene where Freddy and Jason, Freddy knocks over a bucket of spikes that land on Jason. Right before he does that they show a close up shot of Jason and you can very see normal skin of the actor Ken Kirzinger right underneath his left eye.
Revealing mistake: When Mark's back catches fire it is obvious in some shots that his back is covered in some sort of flammable plastic. (00:49:35)
Answer: This is one of those questions where we'll probably never know the real reason because different people involved have different stories as to why Kirzinger was picked over Holder. Holder himself has said he doesn't know why he didn't reprise the role, especially since he was told he would and was given a script. Some accounts say Yu wanted Jason to tower over Freddy and Kirzinger is 2" taller than Holder. One of the casting directors said Yu thought Holder's version of Jason was too campy. Meanwhile, Yu said it was New Line Cinema's decision to recast Holder because they want to change the direction of the film and used this film as a reboot of the series.
Bishop73