Thread:Project:Support desk/master or LTS or current stable/reply

If you want to be sure, it will be better, if you run the latest stable version of MediaWiki, currently is 1.22.6. On newer versions, e.g. 1.23.x or 1.24 WMF you will have the newwest functions and bugfixes, but also the chance of an unstable build or incompatibility with some extensions. With a WMF version for example you have much more work, at least, if you want to be up to date, you must update MediaWiki all over the time and test test test, if the new version works with your installation (environment, extensions, self coded work and so on). So, finally it's your opinion, what you want to choose :)