We did discuss it briefly, and our glorious leader reminded me that so long as members are allowed to have signature images, there will always be warnings about insecure content on a secure page (as those images are hosted outside of the TMF). It somewhat defeats the purpose. We may still go ahead with it, but I am concerned about trading one warning (the login warnings in Firefox, among others) for another (that the page has a mix of secure and insecure content and is not truly secure).