Nope, people have got iPhones within the past few days (many of them replacements for other defective iPhones) that have developed cracks as well. There's lots of posts about the issue in the macrumors.com forums.I wonder if this is an issue with iPhones sold in the first few days?
If the cracks are due to a manufacturing defect (bad batch of plastic, machinery or human error) and assuming it's widespread, then it'll likely be quickly identified and resolved. There's always the possibility that it could be rough handling of the shipment though. There isn't much/any soft padding around the iPhone in the box, so it's possible that if the carton were to be dropped hard enough that it could cause the plastic to crack I suppose. If this is the case, it could happen at any point, but if it's widespread enough, then it could also be resolved by a change to the packaging and/or shipping containers.I wonder if this is an issue with iPhones sold in the first few days?
Hard to tell from that picture.. to me it looks like a bubble in a screen protector...Here's my scratch . Sorry about the image quality! You might have to squint a bit to see it but I can assure you it's more noticable in person!