I don't know if this should be unbreak now or not, but https://en.wikipedia.org/wiki/MediaWiki:Common.js?action=raw&ctype=text/javascript for example triggers this:
```
Forbidden
Invalid file extension found in the path info or query string.
```
```2015-02-12 19:46:07 mw1068 enwiki: [cf13a9f1] /wiki/MediaWiki:Common.js?action=raw&ctype=text/javascript HttpError from line 942 of /srv/mediawiki/php-1.25wmf16/includes/WebRequest.php: Invalid file extension found in the path info or query string.
#0 /srv/mediawiki/php-1.25wmf16/includes/actions/RawAction.php(61): WebRequest->checkUrlExtension()
#1 /srv/mediawiki/php-1.25wmf16/includes/actions/FormlessAction.php(43): RawAction->onView()
#2 /srv/mediawiki/php-1.25wmf16/includes/MediaWiki.php(401): FormlessAction->show()
#3 /srv/mediawiki/php-1.25wmf16/includes/MediaWiki.php(277): MediaWiki->performAction()
#4 /srv/mediawiki/php-1.25wmf16/includes/MediaWiki.php(556): MediaWiki->performRequest()
#5 /srv/mediawiki/php-1.25wmf16/includes/MediaWiki.php(420): MediaWiki->main()
#6 /srv/mediawiki/php-1.25wmf16/index.php(46): MediaWiki->run()
#7 /srv/mediawiki/w/index.php(3): include()
#8 {main}
```
A lot of users rely on this functionality for scripts etc. Same issue for CSS.