As I briefly mentioned earlier when writing about Zotero, Thomson Reuters, owners of EndNote, is suing George Mason University, creators of Zotero. It seems that the lawsuit is going ahead, with recent statements having been released by both parties. As reported by Disruptive Library Technology Jester:

George Mason University issued a statement this morning regarding the lawsuit filed against it by the Thomson Scientific division of Reuters. It looks like GMU intends to fight the lawsuit. It has restored the functionality that allowed Zotero to understand the EndNote® citation style file format and announced that it will not renew its site license for Zotero.

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In a comment to this post, Allison noted that Thomson Reuters has issued a response:
The Scientific business of Thomson Reuters has initiated a law suit against George Mason University (GMU) because of violations of the terms and conditions of the EndNote® Desktop license agreement.

Thomson Reuters VP, Business Strategy and Development, Dave Kochalko said, “Simply put, we strongly believe that the creators of Zotero have reverse engineered our software code which enables EndNote’s bibliographic formatting capability. These format files only exist as software code; there is no content or information independent of lines of code and these files can only be interpreted by the computer. A key value of EndNote is its ability to format a bibliography within a manuscript and the format files are integral to that capability. We have talented employees who have invested many years in building this resource for the EndNote community.”