I wrote an extension that defines a parser function called firebaseraw. I setup the magic word in my .i18n.php file like so: $magicWords = array(); $magicWords['en'] = array( 'firebaseraw' => array( 0, 'firebaseraw' ), ); I register the function hook (along with three tag hooks) in onParserFirstCallInit() like so: public static function onParserFirstCallInit( Parser $parser ) { $parser->setHook( 'firebase', 'FirebaseHooks::wfFirebaseRender' ); $parser->setFunctionHook( 'firebaseraw', 'FirebaseHooks::wfFirebaseRenderRaw' ); $parser->setHook( 'fb-map', 'FirebaseHooks::wfMapRender' ); $parser->setHook( 'fb-navbox', 'FirebaseHooks::wfNavboxRender' ); return true; } I'm trying to use the extension in two different wiki installations. In one, it works. In the other, the {{#firebaseraw }} markup remains and the error_log reads: "" is not a valid magic word for "firebaseraw" Any ideas? Does this mean my magicWords array is not getting read correctly? --Benny