I just got my new 1.33 GHz, 15" PB (with the 5400 RPM drive option). It has been working fine, but today it refused to recognize the power adapter was plugged in. I made sure that the plug was "live" and all that. The adapter's "ring" would not light up. I reset the PB power manager, still no luck. Finally I took the adapter to a friend's house and it worked on his Mac. In almost total dispair, I came back to my home office, plugged it into my PB and then it worked!??? Has anyone got a clue as to what is up? Might it be the adapter has a short or a problem with my new Mac that I should be concerned about? Any input would be much appreciated!