Just found this in my logs:
2013/08/07 09:21:14 [error] 312193#0: *21919 FastCGI sent in stderr: "PHP message: PHP Warning: opendir(): open_basedir restriction in effect. File(/var/run/nginx-cache) is not within the allowed path(s): (/var/www/clients/client2/web8/web:/var/www/clients/client2/web8/private:/var/www/clients/client2/web8/tmp:/var/www/foodandchatter.co.za/web:/srv/www/foodandchatter.co.za/web:/usr/share/php5:/usr/share/php:/tmp:/usr/share/phpmyadmin:/etc/phpmyadmin:/var/lib/phpmyadmin:/usr/share/php:/var/cache/nginx) in /var/www/clients/client2/web8/web/wp-content/plugins/nginx-helper/purger.php on line 684
My nginx is configured to cache here: => fastcgi_cache_path /var/cache/nginx levels=1:2 keys_zone=WORDPRESS:500m inactive=60m;
So how come this plugin tries to delete the cache in here: /var/run/nginx-cache ?