In my error log I am getting a LOT of these: 2008/09/23 16:01:06 [error] 27889#0: *208252 upstream timed out (110: Connection timed out) while reading response header from upstream, 2008/09/23 10:54:05 [warn] 27888#0: *147154 an upstream response is buffered to a temporary file /usr/local/nginx/fastcgi_temp/6/01/0000000016