I noticed in a trace,
http://zh.wikipedia.org/wiki/Talk:%E6%96%B0%E5%8F%B0%E5%B9%A3
gave
HTTP/1.0 200 OK
Content-Type: text/html; charset=utf-8
Content-Type: text/html; charset=utf-8
when it asked me to confirm some math to post a URL.
(Glad no more images quizzes as I have images turned off.)

Probably not my proxy's fault, but I didn't check.

Version: 1.7.x
Severity: minor
OS: Linux
Platform: PC