A company that sells meditation music has filed a lawsuit in a US district court against the file-swapping service Napster The lawsuit alleges that a warning notice which should be included with the music is lost if the music is downloaded with Napster.

According to the lawsuit, the meditation music could pose a danger to drivers or operators of heavy machinery by sending them to sleep. Centerpointe Research Institute, which produces the music, has asked Napster to warrant against any liability associated with downloaded music files.

Like the many other cases pending against Napster, the Centerpointe lawsuit also seeks damages for losses from copyright infringement. It also alleges that Napster used two registered Centerpointe trade marks without consent.

Napster yesterday announced that “all previous versions of Napster have been disabled.” It is instead offering a new version which includes the court-ordered filter that blocks copyrighted songs. The filter operates by identifying songs using a digital representation of its sound.

However, research released yesterday by the digital entertainment researchers Webnoize reveals that the latest version of Napster lets users share very few MP3 files - an average of just 1.5 songs each, compared to an average of 220 under the old system.

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