Artur FijaĆkowski wrote:
I don't know how it's in other countries, but
in Poland copyright act
says that author ALWAYS can withdraw license.
Are you really sure about that? Because it would be a violation of every
principle of copyright. Licenses can be limited upfront to terms, but an
unlimited license - such as our GFDL or our cc-licenses, are
irrevocable. Everywhere, including Poland.
There might be a special provision in Polish copyright law, that
licenses may be repealed under very limited conditions regarding
political or social convictions. But in that case the author has to pay
damages to any legitimate publisher of the work.
A revocation on the spur of the moment because someone doesn't like the
project anymore is not a legal right and we should decide how to deal
with those cases.
Ciao Henning