I had a problem when I first received my powerbook from apple, they didn't include the grounded power plug in the box (accidently got left out from what I know) I could feel electricity coursing through the entire body of the laptop. So I called apple up, they confirmed this was the problem, and overnighted me a ground plug for my power adapter at no charge. All has been good since.
Slashdot Mirror
I had a problem when I first received my powerbook from apple, they didn't include the grounded power plug in the box (accidently got left out from what I know) I could feel electricity coursing through the entire body of the laptop. So I called apple up, they confirmed this was the problem, and overnighted me a ground plug for my power adapter at no charge. All has been good since.