See https://bugzilla.wikimedia.org/show_bug.cgi?id=65366#c5
"Hi. I was using the Special:Random/File tool for a long time on rowiki, in order to fish for unfree images and candidates for Commons. Last days when I accessed the tool, it returned me only Commons files. Tried @ enwiki - same drill"
https://en.wikipedia.org/wiki/Wikipedia:Village_pump_(technical)
Version: unspecified
Severity: normal
I'm pretty sure this is something we did when we implemented Special:Random using Cirrus. Cirrus likes to include commons results in searches so I'm pretty sure we're including them in Special:Random. I'm pretty sure that is wrong.
I went to Special:Random/File and ended up on https://en.wikipedia.org/wiki/Talk:Mastini
I got other results from non-file namespaces, including the talk page of an IP address.
I also went to Special:Random/Talk and got sent to a User_talk page.
Special:Random/NS is seriously broken with Cirrus.
Merged into master. Starting the process to get this synced outside the Thursday/Tuesday/Thursday schedule.
Change 140111 had a related patch set uploaded by Manybubbles:
Update cirrus to fix Special:Random