For those who use old query.php API interface:
Per
http://bugzilla.wikimedia.org/show_bug.cgi?id=12881 , query.php has been
fully ported to the api.php, and thus no longer needed. Unless there are
significant reasons to keep it around, it will be removed both from the
extensions and from the mediawiki sites fairly soon.
If you are still using it, see
http://www.mediawiki.org/wiki/API description
on how to use the new api.php.
Thanks for all the support!
--Yuri