When in dual pane mode, if you click on the full plot, then don't click back but click on another movie, then click back, the plot from the first movie shows over the top of the detail fragment of the first movie.
When in dual pane, the detail fragment toolbar and the containing activity's toolbars update to match the backdrop poster. However, when clicking on other fragments such as the full plot, the new fragment doesn't update it's toolbar colour.