Apple Insider quotes iDeals China:

If one report is to be believed, prototype cases for 3G iPhones allegedly made by Griffin and others may be useless by the time the Apple device is on shelves.

iDealsChina claims that last-minute changes make the actual iPhone refresh 2mm (0.08 inches) shorter and 0.5mm (0.02 inches) thinner than originally thought, potentially leaving these companies with thousands of loose-fitting cases to either sell or destroy. A mockup provided by an insider purportedly shows proof of the end product’s looks.

Notably, iDealsChina both provided the earlier Griffin leak and sells iPhone accessories, making it difficult to independently determine the authenticity of the report.