We have found a workaround for this problem with Woodstock causing security message in IE "this page contains both secure and insecure items" when working under HTTPS. We posted an article how to solve it on our dev blog. Hope that works for you too.
http://mentormate.com/blog/netbeans-visual-jsf-editor-tutorial-web-applications-running-https-displaying-warning-page-secure-nonsecure-items-2/