Running "php dump-tm.php --lang=nl --target=/home/siebrand/export/" on translatewiki.net shell, I am getting:

PHP Fatal error: Call to undefined method FileBasedMessageGroup::getMessageFile() in /var/www/w/extensions/Translate/ffs/Simple.php on line 159

It appears that some methods that are required to make this work have not been implemented.

Version: unspecified
Severity: major