Last modified: 2014-05-28 16:08:59 UTC
Specifically it 500s after a part of page output has been sent. See http://pastebin.com/0kWpYDPp
Prioritization and scheduling of this bug is tracked on Trello card https://trello.com/c/ey2k8hWd
Works fine on http://en.wikipedia.beta.wmflabs.org/wiki/Forty-seven_Ronin?useskin=minerva I think this is bug 65749 which has already been fixed...?
*** This bug has been marked as a duplicate of bug 65749 ***