First off, great plugin! Unfortunately I'm having some issues though. When I have the plugin active, the site permalinks are incorrect for NON-SSL pages. Also when you click the Preview Changes button, the new window that opens goes to an HTTPS page which then reports that "You do not have permission to preview drafts." It seems like the URL structure is getting changes for non-secure pages even though Force SSL is unchecked.
Screen Shot: http://cl.ly/0I2U2J283W0Q263N2p1Z