It must be some extension. It was used during the fundraising campaign to know how much money was donated. In fact, if you try it on the wikipedia, it will show you the graphic at $321,350.02 It's specific of the wikimedia foundation. However, i guess it should be at the SVN somewhere.... :s

Thank you! It is possible maybe to add to FixedImage.php something like this: + $wgExtensionCredits['parserhook'][] = array( 'name' => 'FixedImage', 'author' => 'Brion Vibber' ); or this: + $wgExtensionCredits['parserhook'][] = array( 'name' => 'FixedImage'); ... in order to ensure that Special:Version lists all installed extensions? All the best, Nick.