Robert Michel wrote:
Why so much bureaucracy? When the director of one museum give us verbally the rigth to use this a photo of one modern work of art - what is when his successor do not like us to use this photo with GNU-FDL and he would prefer to make money with picture agency like Corbi$?
I don't think that's entirely necessary. With the increasing use of email, emails are not entirely inadmissable in court these days. I think an unambiguous email from, say, the copyright office of a museum saying that a work is licensed under the GFDL would be sufficient to defend us against a copyright-infringement lawsuit.
We don't, after all, require contributors such as myself to mail paper contracts to Wikipedia authorizing our article contributions to be GFDL'd, so I don't see why image-licensing should be much different.
-Mark