Love the new feature where the TinyMCE editing tools can be hidden, however when the editing box has been in a Web 2.0 style popup window then it appears multiple "Hide / Show" tabs are spawned. Maybe it's just a theme issue (we are just using the Custom Totara theme for testing purposes currently) but every time a new "popup" is launched which contains a TinyMCE editing panel, a new tab seems to appear.
All of the extra tabs disappear when navigating between pages, but when creating appraisal content it's all AJAX and therefore there's not page navigation action when creating new content/pages/switching between existing stages. As soon as a new stage is created, or you go to a different part of the appraisal (General, Assignments, Messages) then you are navigating to a new page and the tabs disappear.