[Wikia-l] Interwiki link to www.wikia.com

[John Beckett]

While wondering (again) how best to do an interwiki link, I found what appears to be
a bug in at least the documentation.

The section:
 http://meta.wikimedia.org/wiki/Help:Interwiki_linking#Wikia

contains wikitext:
 or, for the central Wikia, [[wikia:About Wikia]]

That creates link:
 http://www.wikia.com/wiki/c:About_Wikia

and clicking the link tells me that the page does not exist.

It doesn't particularly matter, but I was wondering how to "properly" link to:
 http://www.wikia.com/wiki/MediaWiki

On a somewhat related matter, why does
 http://vim.wikia.com/wiki/Special:BrokenRedirects

list 
 http://vim.wikia.com/wiki/User:GHe
 http://vim.wikia.com/wiki/User_talk:Jack_Phoenix

I am not complaining (GHe and Jack Phoenix are very helpful). Just curious.

John