For those of you with cracks in the plastic..

Thanks for the feedback. The cracks that I see on the internet appears to be expansion cracks, so either the plastic is shrinking at a different rate than the bezel, or the bezel is xpanding at a different rate. All the cracks seem to be near the metal parts. That's why I was thinking that maybe it had to do with exposure to the hot summer sun. In any case, it is a design flaw from the designers. These things are hard to predict until they happen.

Are you experiencing some pieces blowing off? I would imagine that the plastic shell is made up of a single plastic - I can't see a coating on there. Maybe it's cracking during the manufacturing process as it cools out of the mould? It's hard to say. If you are experiencing cracks away from the metal components, I am not sure what else could be causing this. Either way, this plastic seems to be quite brittle in order to keep it from scratching easily. Do you know if hardeners are used in the plastic mix?

...maybe apple should revise the material, and find an alternative. it's really too bad if this is the achilles of the phone design...I am not sure it will be possible to keep this phone on a 3 year contract crack free...

It would make sense that they would use the same material as the MacBook. The only trouble with choosing a hard plastic that doesn't scratch, is that it does crack easier.