Till Westermayer wrote:
different licenses,
Nobody hinders one to state on ones user-page that every contribution of that user is dual-licenced, as long as the second-licence is compatible to GFDL.
Correction: Practically almost all licenses are _incompatible_ with the GFDL, including the various CC licenses. If the licenses were compatible, there would be no need to explicitly state so, although it might be a good idea. Rather, we allow people to license their contributions under _any license_ because it is _their_ work, not ours. They just have to agree to include the GFDL among the licenses they release their work under.
John Lee ([[en:User:Johnleemk]])