This is really getting out of hand. Things are just breaking one after another in the Apple world. I have a collection of home videos that I burned to DVD using iMovie and iDVD back in 2004, on a G4 tower. My Mac Pro with Lion now does not recognize them and says I've inserted blank CDs when I put them in. I believe they were recognized under Snow Leopard. Is this a known issue? I'm about ready to kill Apple.