OK, I guess this technically isn't a MediaWiki.org problem, since I'm guessing it's probably being caused by something beyond the control of local admins here, but... for some reason, now as I post this, an API request for http://mediawiki.org/w/api.php?action=query&meta=siteinfo&siprop=statistics&format=json (MediaWiki.org site statistics) is somehow being redirected to http://en.wikiquote.org/w/api.php?action=query&meta=siteinfo&siprop=statistics&format=json instead. (For comparison see Special:Statistics and q:Special:Statistics.) Interestingly, a request for http://www.mediawiki.org/w/api.php?action=query&meta=siteinfo&siprop=statistics&format=json (with a 'www.' prefix) is not being affected and returns the correct info. Anyone know what's going on, or whom I should ask about fixing this (since obviously something has changed just in the last 24 hours to cause the problem)?
Topic on Project:Village Pump
Filed as bugzilla:46018.
Do use www.mediawiki.org :-]
Fixed now, BTW.