I bought my first Mac in early November last year, and in preparation for moving files over, had backed up my PC based iTunes Music Folder and all of its content. Some of these files were ripped in iTunes, some were ripped with various other MP3 programs as I'd had various other MP3 players before getting an iPod earlier in the year. All files played fine and their information was easily changed. The main important thing for me was the comments field, around which I base the playlists for my mini (i.e. if there is "mini" in the comments fields it goes into the only playlist that gets sync'd with the mini). But on moving the files over onto the PB, I found that I could only change a fraction of the files information; some looked like they could be altered, but as soon as you exited editting the info it would revert, and others you couldn't even click into the various files - they were effectively "greyed out". The wierd thing is that its not just the pre-iTunes files. Its files I've ripped using iTunes on the PC. Stranger still is that I remember ripping some of my Dads CD's in a single sitting and some of them are affected and some not. Wierd. And even more annoyingly this means I can't remove the "mini" for some of these files' comment fields - which means I'm stuck with them on the mini! One workaround I found was to burn an affected album onto CD, delete the files on the Mac, and re-import. This did work. But not any more . I bought a Rev D PB last week as I was after a superdrive, and the added spec was attractive. Only now when I try this workaround, I'm told that my permissions for the music folder and files don't allow me to import the CD - even though I've checked the permissions and they're fine!!! I'm in need of some expert help! Anyone?