<quote who="Gregory Maxwell" date="Sat, Dec 01, 2007 at 08:44:01PM -0500">
Erik, I have no disagreement with the *text* of the license on this matter. My comment on this point was very clearly focused on the steward organizations and their practices and intentions.
Having talked to several lawyers on this matter, I'm not particularly convinced that the license writing organization's intentions or practices in this regard have any real power to change what a derivative work is or is not.
The CC-By-SA text, which you quoted incompletely, is fairly unambiguous: it even goes out of its way to point out that you are subject to the copyleft when you combine covered sound or video to create a new work
What is problematic is that the Creative Commons has advised people with advice that is at odds with the license.
Perhaps we could ask CC to back off this position and to a do better job of explaining the ambiguous legal situation, and multiple interpretations, that the current state of the law in this matter provides.
Would CC doing so address your concerns?
This write also fails, in my opinion, to explain the real legal uncertainty and variability around this issue.
Regards, Mako