On a recent trip to the Genius Bar at the Apple store, I overheard another customer discussing a problem with generic RAM purchased for her Powerbook. She claimed that her Pb stopped functioning after inserting the RAM. The tech looked at it and said that the RAM was of the right kind and installed properlly. He then went on to say that generic RAM of any sort will cause harm to Powerbooks. I know it's always best to go with a trusted name-brand, but is there any truth to this? Is it absolutely necessary to purchase name-brand RAM (Kingston, Crucial, Viking, etc)? Any suggestions and/or experiences with this would be most appreciated.