From a previous thread, someone was trying to share hidden files of .... an adult nature ... which he did not want others using his PC to know about. Perhaps you have managed to get one of these, although it had seemed that he was unable to share hidden files on Limewire (I'm not quite sure if the question got fully answered)
This is just a thought and the answer may be something totally different. and I trust you will not take offence if the files you refer to are not adult ones!
This was the thread I reffered to :
http://www.gnutellaforums.com/showth...dden+and+files