*Source: BBC News (
http://news.bbc.co.uk/1/hi/technology/6711215.stm)*
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The launch of music tracks free of digital locks on iTunes has been overshadowed by the discovery that they contain data about who bought them.
Some fear this data could be used to identify the owner of the tracks if they turn up on file-sharing sites.
The tracks from record company EMI cost more and are of a better quality than standard iTunes songs.
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