(I'm moving this to wikilegal.)
Andre Engels wrote:
As far as I know, this is not true. Creative Commons
only allows
spreading under the same license, not with more or less
rights. Since the GNU/FDL is not the same license, it is not allowed
to go from CC to GNU/FDL - or vice versa.
I agree completely. By and large, the CC licenses are incompatible
with GNU FDL. This is a big problem, but that's the current state of
affairs as I see it.
I should point out that no less personage than Larry Lessig himself
told me that he thinks otherwise, for the by/1.0 license:
http://creativecommons.org/licenses/by/1.0/legalcode
I never understood why he thought so, though. He may have explained
it to me in a way that I ought to have understood, nevertheless I didn't
and still don't.
Read in particular 4(a) at the link I give above.
--Jimbo