Factual error: The movie is set in the late 1950s, yet Ed's car has yellow-on-black California license plates that weren't issued until 1963. The plates on Ed's car should be black-on-yellow 1956 issue plates.
Factual error: Ed Wood films Lugosi exiting his house, and grabbing a flower near the entrance, a scene to be shown in "Plan 9". However, in fact, the real scene of "Plan 9" shows Lugosi exiting his house, walking across a garage door (that doesn't exist in "Ed Wood") and grabbing a flower around there.
Chosen answer: Because the Special Edition is about to be released. See http://www.dvdauthority.com/reviews.asp?reviewID=3687.
J I Cohen