User blog comment:Dopp/Technical Update: June 21, 2011/@comment-3080486-20110623035817/@comment-876022-20110623170705

The EditPageReskin won't affect you if you have " " checked off in your Preferences under Editing (Note: That this preference won't appear as the revision has not been made live yet).

http://trac.wikia-code.com/changeset/35976 - When it was added, but still fail to see it show.