Apple has issued a warning on its support pages regarding iPhone 3G and iPhone 3GS overheating, marking the first time the company has officially acknowledged the problem. Reports that the iPhone 3GS is having overheating problems have surfaced last week, merely days after the devices was launched.

Over the last few days, many iPhone 3GS users have been reporting that Apple’s new iPhone 3GS is getting abnormally hot when used in various environments.

Apple has now issued a warning on its support knowledge base, which puts the blame on users. The warning prompts users not to leave their phones in a car because temperatures in parked cars can exceed the -20º and 45º C (-4º to 113º F) range the iPhone 3G and iPhone 3GS were designed to function in properly.

Apple says in the support article that “if the interior temperature of the device exceeds normal operating temperatures, you may experience the following as it attempts to regulate its temperature: the device stops charging, display dims, and/or weak cellular signal.”

Other conditions that Apple deems as possible overheating causes are: leaving the phone in direct sunlight for extended amounts of time or using certain applications in hot conditions or direct sunlight for a long time. An Apple overheating scenario is using GPS tracking in a car on a sunny day or listening to music while in direct sunlight.

Apple further advises hot iPhone 3G and 3GS owners to turn their device off when the above-mentioned temperature warning appears on screen and move it to a cooler environment, allowing the iPhone to cool down before resuming use.

Sounds like and XBOX 360 to me! Let’s see if this story gets bigger or swept under the rug.