On September 20, 2007, the first U.S. lawsuit was filed to enforce the General Public License version 2 ("GPLv2"), one of the most widely used of the scores of open source licenses. Given the limited number of cases that have addressed the GPL, this case will be closely watched. If it remains contested, this case could provide some jurisprudence on important issues such as the legal status of the GPL (license vs. contract), the legal basis for pursuing violators (copyright infringement vs. breach of contract) and the remedies (injunction vs. monetary damages) available.