I have had a few like that... there are some fake files are out there... the source is in question but there has been some discussion that the music indusry may be trying to 'level the playing field' by placing fake files on the net. On some occasions I have encoutered tracks that were loops of music rather than a song. I don't think there is any safeguard for this but I think there may be some in the works.... If you do encounter such files please delete them so they will not be proliferated on the net... at the very least rename them as fakes.