Are you sure it's a list of YOUR iTunes playlist? Macs are given a certain default playlist, ie: with each installation we automatically get tunes that come with iTunes. I can't even find an .xml file on my entire computer. Do you have an AV app? If so it might be an idea to check just in case.

Apparently there's certain sources out there that identify gnutella searches & utilize it in sertain ways. If anybody is sharing their entire iTunes lib as I do, then I suppose it's up for anybody to identify these files.

Be warned!: xml's found on the gnutella are very suspicious files, don't be opening them will you. Do a search of 'xml' on the forum (without the rabbit ears of course.)

See post 6 of Quality of Content on the Network .