Drupal File permissions on Plesk 11.5 with PHP-FPM and NGINX

in PHP_FPM PHP runs with the FTP user permissions.

create tmp directory at default/files/tmp

chmod -R 757 default/files
chmod -R 757 default/private_files
chmod 755 default

After that change the tmp file location in http:///admin/config/media/file-system
from ../tmp
to default/files/tmp (the one created above)
and Drupal seems happy.

No errors reported.