Very, very, very minor observation, but the email response to Admins when a comment is submitted is slightly inconsistent. ZP Version 1.6.8
zp-extensions/comment_form/functions.php around line 435/436: -
"View all comments ... http:// $_SERVER['SERVER_NAME']..."
"Edit the comment ... PROTOCOL:// $_SERVER['SERVER_NAME']..."
I presume http in the former should be as in the later - not a major issue, as a well configured server should immediately enforce "er no, I think you meant HTTPS", but...