Continuity mistake: When Kara, Danny, and Tommy are running from Michael, they go into the room with the dead fetus'. Kara locks the door, with there being two locks on the door (you can hear her locking both of them). But, when Michael punched the door and rips the door knob, you can see that there are two locks on it and only one hole for the bottom one to only lock. How did Kara lock the door when the upper one didn't even go to another lock?
Continuity mistake: When John Strode goes downstairs, his hair goes from dry, to moist/wet looking and hanging down.
Factual error: When Tommy is in the phone booth, there's fresh bright red blood on the floor. Since it's from Jamie it would be dark brown by now since it's been there all night.
Continuity mistake: As the film progresses towards the third and final act, Michael's body goes from large and muscular to lean and thinner. No attempt is made to hide this. The reason is because the director decided to change the ending but didn't bring in the original actor, instead choosing a second one whose body doesn't match.
Answer: According to the official Halloween website, it is called "Curse of Thorn." You can read about it here: http://www.halloweenmovies.com/site/thorn.htm.