Creative Commons license for pictures

[Christian Jodar]

Hello,

I'd like to know if it could be a problem for a package to contain pictures
under a Creative Commons License. It would be the BY-NC-SA version:

http://creativecommons.org/licenses/by-nc-sa/2.5/

(Link to legal version on page bottom)

I know there are problem with this license and some people considered it as a
non free license. What about Fedora Extra policy?

According to this page:

http://www.gnu.org/philosophy/license-list.html#OtherLicenses

it could be acceptable for artistic works (so for pictures included with a soft).

Is there a final decision about this question?

If it is not acceptable, is there a solution? I heard about dual licensing.
But I can't understand how it could be used. What does it mean having 2
licenses? If they are conflicting points, how is it managed?

Thank you for your help.

Christian Jodar.