Since about a week ago I've unable to use iTunes to edit the info of mp3s I've downloaded. If I convert them to AAC in iTunes I can edit the info of those new tracks. But then when I try to remove the original track from iTunes I have to restart the app before it will allow me to. I can edit the info of tracks already in my library, mp3 and otherwise. It's all very weird, even for a beta. It reeks of a permissions problem. Anyone experience this? iTunes 10.5 beta, btw.