rtCamp/nginx-helper — pull request #61 by weskoop (2014-05-12 20:21:53+00:00)
Title: Was declaring a very generic global var: $plugin

No need for this 1 use var.

Found confilct with Mailchimp's Social plugin which is making a similar mistake (on line 2277 of social.php)
http://wordpress.org/plugins/social/