The combustion of an Apple iPhone 4 after a regional flight in Australia was likely caused by a botched repair of the handset by an unauthorized repairer, according to air safety investigators in the U.S. and Australia. A small metal screw had been misplaced in the battery bay of the handset. The screw punctured the battery casing and caused an internal short circuit, making the iPhone emit dense smoke (PDF)."

http://apple.slashdot.org/story/12/0...e-after-flight