Plot hole: When the cop shows Pam the newspaper clippings they include what look to be fresh photos of the real Jason from the events of Part IV, yet no photographer is ever seen taking pictures of Jason alive in the previous films and most likely wouldn't live long enough to publish the photo. (01:25:00)
Suggested correction: The picture was taken from security footage at the hospital after killing the 2 employees.
Visible crew/equipment: As Joey walks over to Robin and Violet, who are hanging up washing, a large set of lights is reflected in the window as he walks over. (00:17:45)
Continuity mistake: Jason chases Pam with a clean machete, however in the shot just before he's hit by the tractor, the machete is bloody. (01:10:40 - 01:11:20)
Continuity mistake: During the final chase scene where Melanie and Reggie are running through the woods, the pink sweater which is over her shoulders disappears and reappears at random, until she finally loses it by the tree where her co-worker is found murdered. (01:08:50)
Continuity mistake: The leaves around the blanket Tina and Eddie lay on vary during shots, the position of the blanket changes from wrinkled to smooth and the shade in the scene keeps changing. (00:40:55)
Plot hole: When the couple go into the woods to have sex, after they finish, the guy goes to a pond to clean up, which is not very far from where he left his girlfriend. A couple minutes later, "Jason" is about to kill her, and she screams very loudly. Despite this he doesn't hear her.
Suggested correction: 1st we don't know how far the pond is from where they had sex. 2nd you notice his hair was wet. He could have been underwater when she screamed.
Continuity mistake: When Demon is in the outhouse, the pullcord hanging above his right shoulder disappears in some shots. (00:51:35)
Continuity mistake: When Roy is squeezing Eddie's head against the tree with the leather strap, he is turning the rings counter-clockwise in the first two shots, but then clockwise in last shot. (00:44:20)
Visible crew/equipment: When Tommy is at Jason's grave, a white reflector screen is clearly reflected into his glasses. (00:01:15)
Revealing mistake: In the closeup of Tina's dead body, her chest moves. (00:44:00)
Revealing mistake: When Anita lies dead on the ground with her throat slit you can see her pulse in her neck. (00:53:05)
Continuity mistake: When Sheriff Tucker has the two newspaper clippings he puts the one entitled "Killing Spree End in Crystal Lake" at the top. In the following shot he has the other clipping at the top. (01:21:35)
Continuity mistake: When Joey walks out onto the porch, he has a yellow chocolate bar sticking out of his sweater. In a following closeup it has gone but it reappears in the next wide shot. (00:17:20)
Continuity mistake: Jason gets his left shoulder sliced by a chainsaw. However later his right shoulder can briefly be seen as the one which is cut. (01:17:55)
Revealing mistake: When Ethel gets a cleaver in her face, blood spatters everywhere. Yet the cleaver blade is still clean. (00:56:35)
Revealing mistake: When Jason is raising the machete above Tommy in the woods, it's obvious that his eyeholes are covered with black cloth. This also happens at the end of the movie, where Tommy hallucinates about Jason in the hospital. (00:04:45)
Continuity mistake: When Reggie hits Roy with the tractor, the wound on his chest only appears after he has hit the ground. (01:11:20)
Continuity mistake: When Ethel and Junior take off on the bike, the shades surrounding the police car differ between shots. (00:16:25)
Continuity mistake: As Pam runs through the woods, she stumbles upon Matt with a screwdriver impaled in his forehead. The amount of blood on his face changes between shots. (01:09:25)
Continuity mistake: When Ethel says "Now, I wanna tell all of you. Mark my words." she has her arms down. When it cuts she leans her left arm against her waist. (00:15:55)