error.log file doesn't log "404 File Not Found" errors

[BSD Kazakhstan]

My error.log doesn't show any request/log based on .php requests,
i.e. when I type /test.php (file doesn't exist), error.log doesn't show
anything regarding it.
Shouldn't nginx log this request inside error.log as 404 Not Found?
Nginx run with php-fpm and everything works ok with php.
Any idea?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.nginx.org/pipermail/nginx/attachments/20130704/50ec33de/attachment.html>