Board Thread:Support Requests - Getting Technical/@comment-27987867-20150406144616/@comment-452-20150406174725

As you may know, that message is only shown if the corresponding page doesn't exist with /wiki/

So, http://community.wikia.com/User_talk:452 works because I had a talk page before Message Wall was enabled, and http://community.wikia.com/Help works because http://community.wikia.com/wiki/Help exists, but http://community.wikia.com/HelpMeObi-wan doesn't work, because http://community.wikia.com/wiki/HelpMeObi-wan doesn't exist.

If you would like that /wiki/ part removed completely, you can request it via Special:Contact. There are a couple of large wikis which don't have it, like http://residentevil.wikia.com/

BTW, "subdomain" means the "community" part of http://community.wikia.com - "/wiki/" is part of the path/directory.