I was concerned about the plastic cracking when I found out the iPhone 3G switching over to the plastic shell from the aluminum back for the iPhone 2.5G. It has reportedly begin to happen (MacNN).
No one knows how widespread this issue is or how it happened at this point, we'll have to wait and see just how this will turn out. Engadget has some close-ups of actual cracks.
Love to hear from anyone who has this happen to their iPhones or head on over to MacRumor's forums for more information from users.
Note: Will follow up. Posts on other mobile devices will come soon enough. We've not turned into another iPhone-centric site. Whether you're a fan of Apple or not, iPhone has an incredible device. We will focus more on mobile devices just as soon as they reach users such as yourself and not just the media. I reckon we'll have more information starting in September as we get closer to new Blackberry, Sony, and Android releases. And new iPods...and, maybe, the new Macbook Touch...hmm...