How soon after making a request do you see the 504 and how does it
relate to your fastcgi_read_timeout setting?
(http://wiki.nginx.org/HttpFastcgiModule#fastcgi_read_timeout).

[ Whilst I might have been able to check your config for this, I'm not
going to bother to download a random rar file and unpack it. Learn to
pastebin/gist/etc! ;-) ]

Jonathan
--
Jonathan Matthews // Oxford, London, UK
http://www.jpluscplusm.com/contact.html

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