I just reinstalled OS X on my iMac, and before I did so, I forgot to deauthorize the computer as one of my 3 itunes music store computers...it's the second time I've done this. So basically, apple thinks this is my third computer, when I've been using the same one all along. Is there any way that I can deauthorize the other 2 computers (the ones I did a clean install over)...if I get a new computer, I'm not gonna be able to listen to my itunes music store purchases on it. Thanks