Hi–
I have a similar issue. Any time I click the Pre-cache button, I see a server error.
Here is the log.
2013/07/21 20:42:00 [emerg] 1389#0: no port in upstream “memcached-servers” in /etc/nginx/sites-enabled/wordpress:127
2013/07/21 20:42:00 [emerg] 1390#0: no port in upstream “memcached-servers” in /etc/nginx/sites-enabled/wordpress:127
2013/07/21 20:42:58 [emerg] 1399#0: no port in upstream “memcached-servers” in /etc/nginx/sites-enabled/wordpress:127
2013/07/21 20:42:58 [emerg] 1400#0: no port in upstream “memcached-servers” in /etc/nginx/sites-enabled/wordpress:127
2013/07/21 21:06:10 [emerg] 1439#0: no port in upstream “memcached-servers” in /etc/nginx/sites-enabled/wordpress:162
2013/07/21 21:06:10 [emerg] 1440#0: no port in upstream “memcached-servers” in /etc/nginx/sites-enabled/wordpress:162
2013/07/21 21:07:41 [emerg] 1449#0: no port in upstream “memcached-servers” in /etc/nginx/sites-enabled/wordpress:162
2013/07/21 21:07:41 [emerg] 1450#0: no port in upstream “memcached-servers” in /etc/nginx/sites-enabled/wordpress:162
2013/07/21 22:16:42 [error] 1463#0: *398 FastCGI sent in stderr: “PHP message: PHP Fatal error: Call to undefined function get_blog_option() in /var/www/booklady/wp-content/plugins/wp-ffpc/wp-ffpc-class.php on line 1117” while reading response header from upstream, client: [MY_IP_ADDRESS], server: https://www.bookladyreview.com, request: “POST /wp-admin/options-general.php?page=wp-ffpc-settings HTTP/1.1”, upstream: “fastcgi://unix:/var/run/php5-fpm.sock:”, host: “bookladyreview.com”, referrer: “https://bookladyreview.com/wp-admin/options-general.php?page=wp-ffpc-settings”
I did not change anything from the previous version of the plug-in, so I’m not sure what this is telling me.
Thanks for any help!
–TJ