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Re:Misuse of Creative Commons-licensed photo leads to public... by icebraining on Saturday July 16, 2016 @12:53PM (#12106961)
There's plenty of case law regarding derivative works; it's not CC specific, but why would it have to be? Either the license is valid or it's a straight-up copyright infringement.

For example, there's case law regarding the use of a photo in a movie: http://fairuse.stanford.edu/overview/fair-use/four-factors/#...

Re:Misuse of Creative Commons-licensed photo leads to public... by sago on Saturday July 16, 2016 @09:43PM (#12108664)
You may have a much better knowledge than I (wouldn't be hard). But that example doesn't quite answer the question. If a work is derivative, what is the extent of the derivative work, for the purpose of copyleft? Can you answer that without specific case law on copyleft licenses?