Hi! I have 1.2 Ghz G4 iBook that came with 256 Mb RAM built-in and a 512Mb DDR Ram added, 768 RAM in all. I bought and installed a new 1GB DDR, expecting to have 1,25 GB Ram in all. New memory IS 1GB indeed. When restarting, "About this Mac" keeps saying I only have 768Mb RAM, believing the new memory is still only 512Mb RAM. I also found that battery is being recharged from 0%, when I know it was fully charged before the RAM change, and Date & Time is gone back to 1900. I have Leopard OS. This computer is suposed than handle 1.25 Gb... I checked and RAM seems to be right model for this laptop... What's going on? Thank you!