Wikimedia Bugzilla is closed!

I noticed this occurs only with files other then images, such as audio/video since these wont have thumbnails.

Browsing through the code it doesn't seem to take into account cases like this.

Odd. I can't seem to replicate this locally. What configuration do you have for $wgForeignFileRepos? Do you have any extensions related to Ogg like OggHandler?

It's the example Commons config:

==
$wgForeignFileRepos[] = array(
   'class'                   => 'ForeignAPIRepo',
   'name'                    => 'shared',
   'apibase'                 => 'http://commons.wikimedia.org/w/api.php',
   'fetchDescription'        => true, // Optional
   'descriptionCacheExpiry'  => 43200, // 12 hours, optional
   'apiThumbCacheExpiry'     => 43200, // 12 hours, optional, but required for local thumb caching
);
==

And yea, good eye, doesn't seem to trigger if OggPlayer is disabled. Didn't think about that.

Fixed in r49381