white iPhone 3GS discoloration from heat

We haven't seen or heard about this at TiPb, though it did happen once upon a time with Apple's white MacBooks -- heat related discoloration. We hope and imagine Apple learned from this, but have any of you experienced your white iPhone 3GS suddenly getting a tan? If so, let us know in the comments and more importantly, make an appointment at the Apple Store to get it swapped out ASAP!

[Engadget via Nowhereelse.fr]