Вот и первая проблемка - Content-Type.
HTTP/1.1 200 OK
Server: nginx
Date: Fri, 21 Feb 2014 11:57:25 GMT
Content-Type: text/html
Transfer-Encoding: chunked
Connection: keep-alive
X-Powered-By: PHP/5.3.3-7+squeeze16
Content-Encoding: gzip
Ответ с Content-Type text/html.
Это как то особо повлияет?