What does ERR_SPDY_PROTOCOL_ERROR mean in nginx?

Question

I and a few of my colleagues got the net::ERR_SPDY_PROTOCOL_ERROR error.

We use ngnix version 1.8.0. The error is not stable (hard to replicate), and t

Answer 1

I had a site doing that, it turned out to be someone forgot to put "Location: " in a PHP redirect on the first line of index.php, invalidating the header. Apparently only Chrome cared though, the rest of the browsers still loaded it fine.