Hi,
Great plugin. One issue though...
wpp.css is loaded using WP_PLUGIN_URL which causes a mixed content warning on SSL pages.
To fix this, I made this change in wordpress-popular-posts.php
Line 53:
if (empty($this->pluginDir)) $this->pluginDir = WP_PLUGIN_URL . '/wordpress-popular-posts';
to:
if (empty($this->pluginDir)) $this->pluginDir = plugins_url() . '/wordpress-popular-posts';
Can you please update the plugin to work with SSL?
http://wordpress.org/extend/plugins/wordpress-popular-posts/