Previously we had not set a license for text/data in our Wiki. In order to make things explicit dmppanda has added a new MusicBrainzWikiLicense page that explictly sets the license to be the Creative Commons Attribution-NonCommercial-ShareAlike 2.0 license. This makes the content in our wiki consistent with the data in our database.
If you have contributed to the Wiki and object to this license being set, please Contact Us and we will work out the conflict.
MetaBrainz Blog 