http://opendotdotdot.blogspot.com/2009/09/big-win-for-gnu-gpl-in-france.html
Not only was the GPL upheld in court, the case was brought by a third-party user, not the copyright holder.
This augurs well for the strength of other copylefts.
(But about that moral rights clause ...)
- d.
wikimedia-l@lists.wikimedia.org