Apple has just started to send emails to people worldwide that own a iPod Nano (1st generation) that were made between September 2005 and December 2006, offering them a free replacement iPod Nano. Apparently, these iPod Nanos can overheat, even though it is rare for them to do so, because during this time period they were made by a battery manufacturer that made faulty batteries. Apple had a lot of reports of overheating iPod Nanos. 2 people reported being burnt by their iPod Nano, and one even caused a train to stop for ten minutes and investigate a burning smell until they found out that
a passenger's iPod Nano overheated and burst apart. Reports in some countries forced them to take action. Apple started offering the replacement plan for iPod Nanos in 2009 in South Korea, and in 2010 in Japan. The program is now worldwide.
