Visible crew/equipment: When the well explodes, in one wide long shot, you can see wires trailed along the grass, used for the stunt. (01:23:55)
Continuity mistake: After Ozzy tells the others about the Leprechaun, they all go inside to look. Alex hasn't got his red cap on and he isn't holding it either, yet as they enter the basement, he has it on.. (00:23:20)
Audio problem: When Tori says "something was rubbing my leg" her mouth doesn't move in the shot when she says "my leg." (00:30:30)
Continuity mistake: When Ozzy and Alex are painting, before Ozzy goes inside to clean up, the whole wall is painted blue. Later on in the movie when Nathan runs outside, we see the same wall only half painted. (00:19:10 - 00:49:30)
Revealing mistake: When Tori and others are fighting the leprechaun in the kitchen the wall phone rings and she picks up the hand set. It's the leprechaun on the line and in fear and anger, she slams the hand set back in place and tears the entire phone off the wall. As the phone rips away, it's obvious there is no phone line connector on the wall, only a nail the phone was hanging on.
Continuity mistake: After Ozzie and Alex leave the gold coin to be examined, when the shop owner looks through the book the back clasp of his suspenders is unclasped, then is clasped when he's at the stairs, only to be unclasped after he moves the tricycle, then clasped yet again. (00:35:20)
Visible crew/equipment: Some equipment is reflected in the window of the cop car as it pulls out to chase the leprechaun. [It's a reflector screen.] (00:38:00)
Visible crew/equipment: When Tori goes to the well to give the Leprechaun his sack of gold, the Leprechaun levitates the sack of gold from Tori's hand, and the wire making the bag 'float' is visible. (01:02:20)
Visible crew/equipment: The Leprechaun is on roller skates heading towards the white picket fence. As he gets close while the shot is over his shoulder, his shadow is cast on to the fence at the left edge of the screen. Problem is, a crew members shadow is right next to him for a split second right before the camera angle changes and he smashes into the fence.
Factual error: Although taking place in North Dakota, the Jeep and cop car have the older Illinois plates.
Continuity mistake: When O'Grady pulls the urn out of the cardboard box, the box is sitting on the table. In the next shot it is off, and sitting on the bush next to the table. (00:03:15)
Audio problem: When Tori finds the Leprechaun in Mr. O'Grady's wheelchair, she runs out of the room. We hear her crying in horror but her lips do not move at all.
Continuity mistake: When the man opens the locker, the leprechaun jumps out and kills him by pogo-sticking him to death. He never pogo's on anything but the man's chest, yet the victim has big bloody welps all over his face.
Factual error: The movie takes place in North Dakota, but there are no tarantulas in North Dakota. (00:12:05)
Continuity mistake: At the beginning of the movie when Danny grabs the gun to shoot the Leprechaun, he fires only two shots and has to reload but when he opens the gun chamber to reload, you can see that there are no used shells in the chamber.
Other mistake: After the Leprechaun has used the small car with the pitchfork and rammed the pick up truck, it rolls down the hill 3 or 4 times. The leprechaun opens the door and all 4 characters are not in the vehicle. They have not only managed to all exit the vehicle and hide behind a boulder but have all managed to not receive so much as a single scratch and Jennifer Aniston's hair is still perfectly brushed.
Revealing mistake: Just before the leprauchan claws out the eye from the police officer's corpse, the corpse's eyelid moves.
Visible crew/equipment: When the shop owner looks through the book for information about the gold coin, he hears the bike bell and when he walks toward the stairs, the crew's solid brown rug is visible on the blue floor - note its edges in front of the white bookcase. It is also seen when he walks back to the safe the second time. That rug is gone in all other shots. (This has nothing to do with the large patterned Asian-style area rug.) (00:35:45)
Continuity mistake: During the scenes in the kitchen near the end, such as when Tori answers the phone to the Leprechaun, the magnets on fridge move, appear, disappear etc. (01:04:05)
Continuity mistake: When Nathan shoots the leprechaun after he entered out through the chimney, the leprechaun lies in different positions between shots. (01:05:30)