Oooooohhhhh. Now I get it. I was desperately trying to figure out why they would bother, frankly, to go through the trouble of changing the music, but this makes a lot more sense. I've seen several titles that were obviously mistakenly transferred from an "unfinished" version of a movie. This is fun for me, as I work in post-production and enjoy pointing out the tell-tale signs (see below), but this is lousy if you just want to watch the damn movie. The only other disc I've seen with several really obvious changes is 'Friday the 13th: The Final Chapter,' which has a couple of music cues missing and--I think--hadn't yet had all of the color properly corrected in the print they used. Color correction, you see, is done to make various shots match up to each other if they didn't before--if Shot B looks bluish compared to Shot A, but they're both supposed to be part of the same scene. If it hasn't been done yet, it looks more or less like 'The Final Chapter' does on DVD, with scenes jumping from reddish to bluish to greenish (although even that doesn't explain how it changes from one to the other in the middle of one shot). This is also why, when Jason turns out the lights in the bathroom near the end, nothing happens: now it's obvious that it wasn't dark enough to register when they filmed it, and so they had to darken it again in post, *after* whenever this print was made. All of which is a long way of saying, it looks like they actually managed to do the same thing here and transfer an intermediate version of 'Happy Birthday to Me,' with a temp score in place instead of the one that was eventually written for the movie. This is like reissuing a book by picking up the Xeroxed manuscript from someone's desk and shipping it off to the book-binder, so that the finished product still has all of the mistakes and notes in the margins. Awful cover art aside (though it's really bad), making an error like this can only be the result of awesome indifference towards catalog titles like this one. P.S. The original score was nominated for a Genie, and though most of my enjoyment from the movie comes from its being such a delirious train wreck in the screenwriting department, I do have to say that the music was notably good.