checked items in "Exclude from protection" become unchecked

Version 1.0.5 of the plugin in use with BuddyPress 1.6.4 / WordPress 3.5.1 and finding this old problem has come back. I don’t know what’s causing the unchecking of the boxes yet, nor how it was solved for earlier version of this plugin.

http://wordpress.org/extend/plugins/private-buddypress/