There seems to be some new issues with the iPhone 3GS, besides the sound issues reported before. Instead of cracking like the iPhone 3G, the iPhone 3GS turns brown if overheated!
A user claims discoloration of his iPhone due to overheating, possibly because of excessive 3G and GPS usage. It seems like an outline of the battery inside which got overheated badly, though not bad enough to burn someone's lap . . .
This issue seems be unique to the user as there are no other reports of such discoloration of any new White iPhone 3GS' and we hope it remains unique. The user reports that his phone has been sent in for analysis and he might be getting a replacement soon.
[NowhereElse via Engadget]