Jay R. Ashworth wrote:
http://commons.wikimedia.org/wiki/Commons:Licensing#Screenshots Screenshots are copyrighted if the displayed program or operating system is copyrighted. For a detailed discussion see http://www.jisclegal.ac.uk/publications/copyrightalexmorrisson.htm
The terrible truth about laywers, courtesy of the late Mark MacCormack, is that they'll tell you what's *safe*, not what's *reasonable*.
I'm pretty sure Apple is very proud of its Aqua widgets, and equally sure they'll be after you with a thousand lawyers if you try to claim their graphical designs are owned by you because they happen to be visible in a screenshot you made. If you successfully fend them off, let me know, I could use a bunch of textures, and clipping them from WoW screenshots will save me a lot of time, not to mention Blizzard's artists have better technique than I can muster.
Stan