I'm having an odd problem with a G4 Dual 867 MDD I recently bought off ebay. It came with 10.4 Tiger loaded, and a Retail install DVD for Tiger. I wanted to customize the installation, so I went re-install the OS using the DVD. It went through the install, but at the end it told me there was a problem with the install, and I needed to re-install, ( erased the previous installation.) I had some Panther CD's, that installed fine. Tested DVD player, some disk's load fine, some not at all, some have poor playback. Tested the install DVD on the machine I bought the Panther disks for, Tiger installed no problem. (Re-installed Panther later). Anyone have any ideas?