I have a Mac that was running 2.12 and even today, doing an update check showed it was the latest version, when 2.15 was the real latest version.
Also, About a week ago or more, one of my PCs showed there was a new version (everything was on 2.17), but now if I manually check for updates, all show there are none, though 2.18 is out.
Are there issues with the latest versions? Or you are now holding off recommending the latest until they've been out longer? What's going on?