Until now, when translations are removed from the latest development code, they are also removed from launchpad.net
This means that the translation files are always at the latest version.
However, it means that you cannot always use them with stable releases. This is because messages that are no longer used will be deleted.
So, I have changed the way we handle "deleted" translations.
From now onwards, the translation files (*.MO) will include all the translations for both the current stable release and also the latest SVN code.