Unfortunately Schindler doesn't take into account the very long
discussion at de:WP:UF
http://tinyurl.com/fdld4
There is a very dangerous opinion that "work" according free licenses
means "work in any resolution" and thus low-resolution pictures
licensed under a free license could be replaced by high-resolution
pictures.
If there is no trust for cooperating institutions that the resolution
part of the contract is accepted I am in doubt that cooperations will
work in the future. A word from the WMF board or the lawyers
(WMF/CC/FSF) would be useful.
Klaus Graf