Hi, I have a probleme with the headers requests ( "HEAD" ) and nginx 0.8.52 when i try with http1.1 , i have an error "504 Gateway Time-out" or i must set a very small number at keepalive_timeout . and with http1.0 , it's ok .. Please somebody can explain to me why ? Excuse-me for my very bad English :s my code php : $out = "HEAD / HTTP/1.1\rby stopher - Other discussion