There have been recent online posts displaying pictures of a Samsung GALAXY SIII that appears to have heat-related damage at the bottom of the device. Samsung is aware of this issue and will begin investigating as soon as we receive the specific product in question.
Once the investigation is complete, we will be able to provide further details on the situation. We are committed to providing our customers with the safest products possible and are looking at this seriously.
[Update: July 7, 2012] Following a series of tests, an independent third-party organization determined that an external energy source was the cause for the damage on the GALAXY SIII in question. In other words, no, the Galaxy S III did not blow up on its own. http://global.samsungtomorrow.com/?p=16161