On my site (only on one url) there is no response header sent. I'm using Tamper Data, and the response block is full empty. I'm using nginx az a reverese proxy with apache. Every other request goes ok, but this one not.
If I try with port 8080 (Apache) it goes well. But it's still strange that all the other pages get response header through nginx.
I can't imagine what can be the problem.