It's a very bitter story, actually... I didn't discover this musical until last year, in 2005. I don't live anywhere near New York City so I wouldn't have gotten to see it on Broadway, but I found out that the US tour came to a local theatre in 2000. I was so upset! If only I had known about it back then! But I also think that, well, I was younger then... maybe it wouldn't have had such significance for me.
I'm hoping to see a local production someday, if one ever happens... though frankly the thought of high schools doing it makes me laugh. Imagine a parent coming to see a happy little high school show and getting the story of a lynching. XD
However, I did shell out money for the complete libretto and I've read it several times. I actually got it after I went crazy mad about the case and did all sorts of reading on it, which is why the changes/inaccuracies stood out for me so much... I actually think that Parade's libretto is its weak spot (not the song lyrics but the talking ones) and most people have said so as well.
Still, like I said, work of genius. When I got the OBC from the library I put off listening to it because it sounded so darn depressing. Finally I put it on just to get it over with... and, well, I was hooked right at "The Old Red Hills of Home." You know when you put on a cast recording and you know from the beginning that you're in for something amazing? It was so like that for me.

And like I said, I cried so hard at the end. I don't think I've ever cried so hard over a recording before.
Jimmy, what are you doing here in the middle of the night? It's almost 9 PM!