A number of iPhone 3GS owners have complained that the handset becomes overly hot, with at least one user reporting a discoloration of the white plastic back. Photos posted to the French site Nowhere Else (Translated Link) show a 16GB white iPhone 3GS unit with reddish/pink discolorations running vertically down the back on either side of the Apple logo; the user claims these appeared after the phone got “very hot” while testing out…
