twice chunked

[Ensiferous]

Currently Nginx does not support chunked responses from backend servers.
There is a patch available in the dev forum/mailing list,however it is
still considered experimental and you'll have to apply it to the source
yourself.

If you do not want to do this then you must force Apache to never return
chunked responses, that's the only way this will work.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,213632,213633#msg-213633