On Fri, 31 Aug 2012 19:56:27 +0400
Alexandre Prokoudine <alexandre.prokoudine(a)gmail.com> wrote:
  On Fri, Aug 31, 2012 at 7:44 PM, Nils wrote:
  But for Creative Commons ShareAlike? Is music a
derived work from samples under cc-by-sa? 
 Is your video a derivative work from fonts that you used in titles?
 Should your document be property of Microsoft, if you used Times New
 Roman in a Word file?
 What do you think? :)
 Alexandre Prokoudine
 
http://libregraphicsworld.org 
For fonts this is clearer, at least if they use a license like SIL Open Font where it is
explicitely stated that documents are not derived works.
But the full text version of the cc-by-sa license is at best vague.
Nils