All pages that display sensitive information are served over a secure channel protected by a self-signed security certificate. Some browsers (Firefox 3 in particular) will display a message which suggests that there is something wrong with the security certificate presented by this site. If you read the warning message you will find out that the complaint is related to the fact that this is a self-signed certificate and/or that the certification authority is not recognized by your browser. This warning can be safely ignored. In the case of Firefox 3 you can add a security exception which will get rid of this warning message in the future.