SafeNote, an interesting new way to send (roughly) 2.4 kilobyte completely secure messages easily, does not work with IE6:
Why don’t you support IE6?
First, its old. SEVEN years old, which makes it difficult to support. Second, it would require an ActiveX control to do the XmlHttpRequest queries we want. ActiveX- something we tell people to DISABLE due to its many many security problems. So we do apologize, but encourage you to upgrade to Internet Explorer 7, or Firefox. –SafeNote