Hi, So I just received my Powerbook G4 1.33 with 2 GB of RAM. It came with Panther, I play with it a little bit, and then I just put the Leopard disc inside the powerbook. However I can't install it. The Installer hangs or tells me "Failed to validate" I'm doing a clean install, hard drive is healthy and working properly. What could it be? ------------------ Well, I removed one of the RAM memories, the install went smooth. I put it back and I have my shiny PowerBook G4!!! Dang it! looks so beautiful!!!! And cheap!