[XODIDOX]

It's supposed to show all "Versions" and when you click on a specific version, you will see all movies that have that version.

Sure, but without the node xml file and the additions in the diff I linked (regardless of whether or not you drop the changed SQL) it doesn't work.

Also, the difference is with tags that they already exist.  With your feature, there could be many versions (10th Anniversary, 20th Anniversary etc) that just don't exist for anything.  So therefore, its pointless to show them.

Now I see your point. So you want to hide the system defined versions if it's empty? We shouldn't hide user defined versions even if it's empty. But if user want to add a new version from navigation, because empty system defined versions are hidden, user don't know that version exist in system, they have to input it? I'm not sure it's a good user experience. I'm not against to do this though.