Apple has started a worldwide program to replace its first-generation ‘Nano’ iPod music players due to battery overheating problems, asking owners to refrain from using it and getting it replaced for free, reported Xinhua. Apple posted a notice in its official website’s support section on Friday stating that it had found that, in some rare instances, the first-generation iPod nano could overheat and result in safety risks. These nanos had been sold between September’05 and December’06. The ...