Files truncated

[Axel]

Hi guys, 

another quick question: I'm still trying to figure out why sometimes some files are truncated when they arrive on the client's browser. For instance, a video that lasts 1 minute is cut after 5 second on the browser. I found this in my logs:

2010/07/07 16:55:02 [warn] 11417#0: *1389 an upstream response is buffered to a temporary file /usr/local/nginx/fastcgi_temp/8/03/0000000038 while reading upstream, client: 213.215.7.xxx, server: www.yyy.com, request: "GET /reyrant/cyrylot-87.htm HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "www.yyy.com"

I tried to issue:
root at ns20xxx46:/# ls /usr/local/nginx/fastcgi_temp/8/03/0000000038
ls: cannot access /usr/local/nginx/fastcgi_temp/8/03/0000000038: No such file or directory

What is that a Warning? Is it normal the file does not exist?

Tksss

Axel