Though SHA-1 is still considered to be secure to use for now, the Internet community and some major web companies such as Microsoft and Google already think the world should move to the better security provided by the SHA-2 algorithm in SSL certificates, to avoid any content spoofs or man-in-the-middle attacks. To ensure the transition will be as smooth as possible, we’ve decided to move to the SHA-2 algorithm right away.
Additionally, we also disabled SSL 3 on our servers in order to protect you from the POODLE attack. However, we encourage all customers to update to the latest browser versions which automatically disables SSL 3. If you cannot upgrade you can manually disable SSL 3 in your browser settings.