We have solved the Visual JSF(Woodstock) issue when running it under HTTPS and IE 7 by following the steps described in the MentorMate development forum. Worked out well and now we don't have those annoying security message popup. See the link below
http://mentormate.com/blog/netbeans-visual-jsf-editor-tutorial-web-applications-running-https-displaying-warning-page-secure-nonsecure-items-2/