I have a G4 14" iBook running system 10.4.10 with 512mb of RAM. It is a couple of years old and has always worked flawlessly. Today, when I inserted a music CD that I have used many many times, I get the message that the disk I "inserted was not readable by this computer", however, I can put this disk in another iBook and it is fine. I then tried a data disk and that worked. I then tried another music disk and got the same message. If I go to disk utility, I see the disk there, but it does not sure up in iTunes. I repaired permissions and reset the PMU and neither made a difference. Does anyone have an idea on what could be happening?? Thanks Darlene Hess hessd at lockwood.k12.mt.us