What are some problems in application development for networks?

Sharman Networks considers Kazaa Lite to be a copyright violation. On August 11, 2003, they sent a letter to Google requesting that all links to the Kazaa Lite application be removed from their database. During December 2003 Sharman emailed the owners of all sites hosting a copy of Kazaa Lite, threatening legal action if it was not removed. Because of this, the program was for a while difficult to find on the web, and development of it stopped. As of mid-2005, the program is again widely available. It also remains available on the FastTrack network itself, where it can be downloaded with Kazaa or any other FastTrack client. There are rumours that new versions of KMD will prevent Kazaa Lite from connecting to the FastTrack network. In March 2005 Sharman Networks again sent a letter to Google requesting that all links to the Kazaa Lite application be removed from their database.