I was having the same problem, but if you play it in the limewire player instead of itunes it won't be corrupt. Then just go to the file where you saved it and double click. It'll open up in itunes without any problems. I made a file for only limewire downloads so I don't get confused between that and what is already in itunes. I know it's not the easiest thing, but it works. Just go to preferences and download, and then check the box where it says use limewire player. Let me know if it works for you.