The New iPhone 4 problem sends Apple into Panic.

Apple's solution to the much publicized iPhone 4 antenna problem was to advise it's clients to buy iPhone 4 cases. Due to the magnitude of the problem, Apple was eventually forced to offer such cases on a global scale.
However, as of today, Ryan Block of Gdgt reports that some third party iPhone 4 cases lead to the glass back of the phone being cracked. The explanation of this unfortunate occurrence is that once the iPhone 4 is slipped into a case then small particles of dust do get caught between the case and the phone. These "particulate matter" then cause small scratches on the back glass which eventually blooms into big cracks.
To make matters worse, even without the particulate matter and the cases, the iPhone 4 can still get scratched
leading to the very same problem. In other words, with or without the cases, the iPhone 4 is scratch prone device.
In view of all of the above, it is not difficult to visualize why this scenario has sent Apple's engineers into a "quiet panic". In as much as Apple is trying to come up with a solution to the problem with the objective of preempting any further tarnishing the iPhone brand, Apple faces a titanic challenge for the iPhone 4 together with it's structural and engineering problems has already been shipped. In a word, the solution to such structural cum engineering problems can only happen at the per-shipping stage as opposed to the post-shipping stage. If the contrary were true, then jailbreaking would not be possible.