In a response to another thread I opened earlier today regarding the hard drive models used in the new Macbooks, a macrumors member replied that he returned two new (2.4 GHz Penryn) Macbooks to Apple because, as he suspected, the 250GB/5400RPM Fujitsu hard drives they shipped with were causing excessive vibrations. He added that the third Blackbook he received from Apple contained a Hitachi 250GB/5400RPM and turned out to be fine -- no vibrations. Does anyone else have a similar experience to share? Are Fujitsu drives suspicious? And why does Apple use dissimilar drives for the same model? Doesn't this result in performance inconsistencies? I was about to order a Blackbook today but I have now grown a little skeptical and reluctant. Thank you.