kimbacaffeinate on "[Plugin: WP Mobile Detector Mobile Plugin] permissons? 777"

Getting the following error after update released:
Please set the permissions on this folder (/home/content/33/11447733/html/wp-content/plugins/wp-mobile-detector/cache/) to be 777 to allow the WP Mobile Detector to work properly.

http://wordpress.org/plugins/wp-mobile-detector/