LOS ANGELES, California (AP) -- Turning the tables on record labels, makers of the most popular Internet song-swapping network are suing entertainment companies for copyright infringement. Sharman Networks Ltd., the company behind the Kazaa file-sharing software, filed a federal lawsuit Monday accusing the entertainment companies of using unauthorized versions of its software in their efforts to root out users. Entertainment companies have offered bogus versions of copyright works and sent online messages to users.
