А через nginx это к апачу придёт?
http://www.apache.org/dist/httpd/CHANGES_1.3
SECURITY: core: If a request contains both Transfer-Encoding and
Content-Length headers, remove the Content-Length, mitigating some
HTTP Request Splitting/Spoofing attacks. This has no impact on
mod_proxy_http, yet affects any module which supports chunked
encoding yet fails to prefer T-E: chunked over the Content-Length
purported value. [Paul Querna, Joe Orton]
Да, пройдёт. nginx сейчас игнорирует Transfer-Encoding.
Надо будет поправить в 0.3.12.
Игорь Сысоев
http://sysoev.ru