1. Captcha removed from the plugin. Instead security check has been added in Send to Link form submit page. With this new option Send to Link form accept submission only from your website domain. It simply reject the submission other then you website domain. After plugin upgrade, Please deactivate and activate the plugin once.
2. Option to update Mail Subject and Mail Content from admin.

git-svn-id: https://plugins.svn.wordpress.org/send-link-to-friend/trunk@937188 b8457f37-d9ea-0310-8a92-e5e31aec5664