Important information: We strongly recommend all users to use the Isis template. The Hathor template has not been updated to work with the new features shipping with this release. When we released Hathor it was built with accessibility in mind, but over the years the Isis template has been improved in terms of accessibility and supporting technologies. We now believe that the Isis template is as good as or possibly better than Hathor. To ensure a smooth experience for our users, during the update process, the default administrator template will be switched to Isis. You are free to switch this back after the update but we cannot guarantee and in fact know that many features will not work with Hathor.