Visible crew/equipment: When Freddy is brought into the real world and is fighting Jason in the cabin, look carefully as Jason picks up Freddy and pushes him out the window, you can see a cable attached to Freddy's chest in a close up. (01:14:35)
Visible crew/equipment: In the scene where Lori wakes up in the police station and follows the dropping blood, she turns a corner because she hears a little crying. Right after she turns the corner, the cameras show office windows. You can see someone sitting down and a cameraman on his knees.
Visible crew/equipment: In the dream fight between Freddy and Jason, you can see the wire that holds the machete up when Freddy catches it after Jason swings it.
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