I made mediawiki message containing category link for tracking articles with specific error
(e. g. missing <references> - [[cs:MediaWiki:Cite error refs without references]])
Content was:
Message text<includeonly>[[Category:Foo|{{PAGENAME}}]]</includeonly>.
It worked fine in november, but now these categories were empty and I had to remove <includeonly> from messages to fill them again.
But now this MediaWiki message is in this category too