On Swedish Wikipedia there are categories like "Kategori:Wikipedia:Utmärkta artiklar" for Featured articles. But if you try to enter that [1] as a category in the search box you will not get any results. Instead you get the answer "Det finns inga sidor i Category:Utmärkta artiklar." where the Wikipedia: has been lost.
[1] http://sv.wikipedia.org/wiki/Special:RandomInCategory?category=Wikipedia%3AUtm%C3%A4rkta+artiklar
Version: 1.22.0
Severity: normal
Work around - Include category prefix, for example: https://sv.wikipedia.org/wiki/Special:RandomInCategory/Kategori:Wikipedia:Utmärkta_artiklar
Change 80658 had a related patch set uploaded by Brian Wolff:
Make RandomInCat work for cats starting with namespace
Change 80658 merged by jenkins-bot:
Make RandomInCat work for cats starting with namespace
(In reply to comment #4)
Merged. Needs backporting to wmf14?
I wouldnt be opposed to backporting, but i don't really see the need. Affects only some categories and there is an easy work around