Use 2.1.4 or 3.0?

Marc Lepage wrote:

I do notice that the download page http://www.cocos2d-x.org/download lists 2.1.5 as an “older version”, you have to click through the link to find it. If 2.1.5 is the latest stable release and 3.0 is only alpha, maybe 2.1.5 should be the main download link on the main page (with 3.0 alpha right below it, sure).

yes, it is a bug.
v2.1.5 should be mentioned there as the stable version, and v3.0-alpha as an unstable version.