Hello there, I currently own a 15" PB G4 1.25GHz. However recently I've upgraded the RAM from 512MB to 2GB. Apparently the PB suffered from frequent kernel panics which always caused the system to lock up, I put up with it for a week until I've had enough as the crashes became more disturbing. Then I took out the new 2GB sticks out and put the old 512MB ones (that came with PB originally) back in and the PB functioned perfectly well as normal like it used to before the new RAM were put in. The new 2GB RAM are of Kingston Technology make so it looks like my PB didn't take to it too well. I think it's such a shame Macs sometimes do not take to new RAM that well making it harder for you to upgrade which it would be easier to purchase a new Mac as Apple itself would like you to! Honestly there is nothing wrong with my PB, it just needs speeding up a bit ready for Leopard's release, that's all. So what RAM brands are recommended for my fussy PB? Is Crucial worth it? I worry about buying another brand only for my PB to pooh-pooh it again! I'm kinda in a dilemma so any ideas guys?