Apple issues Heat Advisory for iPhone 3G, 3GS

Whether anecdotal reports of iPhones overheating are true or not, Apple has taken them seriously enough to reveal the presence of a temperature warning screen for the iPhone 3G and 3GS.

Here's the deal: an unknown but probably very small number of iPhones have been affected by overheating, to the point that some white iPhone 3GSes have allegedly turned pink.

Apple, however, has issued what some might call a "common sense" warning: a support document that warns users not to keep the iPhone in an environment where temperatures can exceed 113 degrees Fahrenheit, including parked cars.

But Apple also warns that CPU-intensive applications, such playing music or using the GPS while in direct sunlight may also overheat the iPhone.

Apple also says that the iPhone 3G and 3GS should not be stored where the temperature can fall under -4 degrees Fahrenheit, or used in less in temperatures under 0 degrees F.