Wiki has InstantCommons enabled.
Page embeds [[File:Example.svg|123px|thumbnail|foo]].
Page hasn't been changed in several days.
When viewing the page now it outputs the following before <!DOCTYPE html>:
<br />
<b>Warning</b>: unlink(/Users/krinkle/Development/wm-git/mediawiki/core/images/thumb/8/84/Example.svg/123px-Example.svg.png) [<a href='function.unlink'>function.unlink</a>]: No such file or directory in <b>/Users/krinkle/Development/wm-git/mediawiki/core/includes/filerepo/backend/FSFileBackend.php</b> on line <b>418</b><br />
Version: 1.20.x
Severity: normal