Problems that remain unfixed for now:
* the ParserCache is off again :( Find out what *else* in mw MW is calling our parent class.* the Preview messes with entities. Perhaps fixable by temporarily replacing cmdcode etc., then calling doing something with htmlspecialchars() and re-assembling.
* the "redirected from ..." message is not displayed. I seem unable to make it reappear in 1.34 because of the CmdPage inheriting from WikiPage but the redirect creating a hardcoded WikiPage object. I will retry when MW 1.35 is officially released.