Yes, against Franken. I don't recall what the gravamen of the complaint was.
The cover of Franken-stein's book looked like the O'Reilly's show. (and FNC)
Fox and O'Reilly were attempting to get an injunction against Al Franken and his publisher to prevent them from distributing "Lies and the Lying Liars Who Tell Them: A Fair and Balanced Look at the Right." The judge dismissed Fox's suit.
http://www.cnn.com/2003/LAW/08/22/fox.franken/