Currently when you visit https://commons.wikimedia.org/wiki/Special:MIMESearch, you get a form that looks like this:

This page enables the filtering of files for their MIME type. Input: contenttype/subtype, e.g. image/jpeg.

MIME search

MIME type: [ ] [Search]

However, this feature has apparently been disabled. So no matter the user input, you get an error (from https://commons.wikimedia.org/wiki/Special:MIMESearch?title=Special%3AMIMESearch&mime=image%2Fjpeg):

This page enables the filtering of files for their MIME type. Input: contenttype/subtype, e.g. image/jpeg.

This special page is disabled for performance reasons.

This is brain-dead behavior. Don't give a user an input form that doesn't work. When a user loads https://commons.wikimedia.org/wiki/Special:MIMESearch, it should simply say: This page has been disabled due to $wgMiserMode or whatever. The current behavior of "sure, input your MIME type... just kidding!" is wrong.

Version: unspecified
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=13438