perusio/drupal-with-nginx — pull request #173 by vectoroc (2014-06-18 22:03:35+00:00)
Title: Update drupal.conf

this location filters out correct request like /user/autocomplete/a.sh

compare these urls
http://drupalspb.org:8080/user/autocomplete/a.sh
http://drupal.org/user/autocomplete/a.sh

btw. another case is /user/autocomplete/a.php