Thread:Project:Support desk/Updatation of Mediawiki 1.12 to Mediawiki 1.20/reply (2)

If you haven't modified core MediaWiki files (for example, you haven't editted any files under ), then upgrading should be fairly painles modulo bugs. I recently helped someone upgrade from a modified version of 1.11, so I know there isn't much to worry about if you haven't changed core.

If you've modified the skin or created your own, you have some more work to do.

Otherwise, as the other commentor said, be sure to back up before you start.