Thread:Extension talk:Update/Error on Mediawiki 1.21.1

I got the following error in the apache logs:

[Fri Jun 28 15:35:18 2013] [error] [client 217.133.96.194] PHP Fatal error: Call to undefined function wfLoadExtensionMessages in /var/www/fountainpen.it/mediawiki/extensions/Update/Update.SpecialUpdate.php on line 61

I had to remove it...