Hi I have an iMac G5 and I get these messages when trying to burn files to DVDs. They read error message 0x80020063 disk could not be verified. I think this started to happen when I upgraded to leopard. It said this message many times and I just ignored it until I needed one of my backup DVDs and I found the first file corrupt. I just burnt another DVD and it said this same message but none of the files were corrupt. Does anyone know what the problem is?