The front editor works fine on all themes. But there is an issue with hover button for saving the content. The "fee-hover-container" doesn't show(hides to the left) up when the theme's layout(Metro) is full screen occupying the entire screen.
Attached screenshot: http://i.imgur.com/mKHg3RB.png?1
Even if we change it with css, it still cause trouble somewhere on front-end pages.
Hope you come up with a solution.