> There shouldn't be any licensing troubles, at least.
Under many (if not most) jurisdictions it's not possible to put things in the public domain, and saying you do so without providing an actual license is the same as not doing anything (aka "All Rights Reserved", the restrictive default).
Even in the US, the idea of putting things in the public domain (rather than it falling into the public domain) is a bit iffy and AFAIK has never been tested in court.
Hum, it feels to me there are subtle differences between German and French law. Notably, the right of withdrawal and the respect of the work's integrity go beyond German law.
In French, a piece of work is not "put" in public domain but is said to "fell". It's not something that needs doing, it's something that happen at the right time.
Anyway, I'm probably wrong since I'm not a lawyer :-)
Under many (if not most) jurisdictions it's not possible to put things in the public domain, and saying you do so without providing an actual license is the same as not doing anything (aka "All Rights Reserved", the restrictive default).
Even in the US, the idea of putting things in the public domain (rather than it falling into the public domain) is a bit iffy and AFAIK has never been tested in court.