Continuity: Right after Michael kills Brady, Jamie and Rachel run up some stairs to the attic. At this point the stairway is empty, Jamie and Rachel therefore throw stuff down the stairs to make it harder for Michael to come after them. But when the shot changes to Michael coming up the stairs there are now more things on them, then what Jamie and Rachel threw. Look for the chair.

Continuity: Myers at the end rips Rachel's shirt on the sleeve when she is driving the truck, right after he rips it, it is together again, he rips it again, then it is together again!

Continuity: When Dr. Loomis is thrown through the window by Michael Myers in the school notice that Myers' hair has strangely turned white. The next shot Myers' hair has gone back to being brown. This is more evident in the widescreen version.

Revealing: When Micheal sticks his thumb in the ambulance guys head, you can see the inside of the fake hand.

Audio problem: When the head of the Federal Sanitarium gives over control of Michael to the Doctors from Smith's Grove, he says, "I can safely say that Michael Myers is in your hands." If you watch his lips, you can see that the sound of the words and his lip movement is way out of sync.

Visible crew/equipment: When Loomis looks out the window for Michael, you can clearly see the cameraman's reflection(best seen on the Limited Edition DVD).

Plot hole: Near the end of the movie, Jamie and Rachel are being taken down the highway to safety by the vigilantes when Michael climbs into the back of the truck from being underneath it. Michael then struggles, stabs, and violently throws two of the vigilantes from the truck, and the third vigilante, standing only inches from the other two and still holding guard in the back of the truck, appears to see or hear none of the commotion. Impossible, even for horror films.