New in 1.17! but not really a blocker or otherwise important.
When viewing the uncustomized (aka non-created) page in mediawiki namespace for a message that defaults to the empty string, its treated as if there is no such message.
to reproduce:
*Go to: http://en.wikipedia.org/w/index.php?title=MediaWiki:cite_reference_link_suffix&action=edit (as a normal user without editinterface rights)
This is a message that uses the default, and that default is ''.
*Behaviour seen: no text box to view source. Treated as if there is no such message. Additionally, links to that page are red (see http://en.wikipedia.org/wiki/Help:Cite_messages ).
*Expected behaviour. Be treated like a normal message that has content by default and hasn't been customized by the wiki. For example, like http://en.wikipedia.org/w/index.php?title=MediaWiki:cite_reference_link_prefix&action=edit (although that might not be best example, as there's talk of killing that message). Additionally, links to the message should be blue, since it "exists" (sort of anyhow). Exists and is empty, should be treated like exists and has content, not as if there was no such message.
Version: 1.17.x
Severity: trivial