One of the features I liked with iLife '04 was that you can use the music you purchased thru iTunes in your own slideshows from iPhoto and your own movies in iMovie. Even use Quicktime to grab a part of a song to play. But since I upgraded to iTunes 4.5 on two of my Macs, it mentions that my Mac isn't authorized to play those songs. It asks if I want to authorize my computer using my Apple ID and then it runs that part but still doesn't work. iTunes works great with playing those songs. Can some of you see if this is happening to you?