
For me I don't see any black bars.
I'm just saying that I think it's weird that the UI elements are not separated so you get text in between the buttons like this, and it's not a good user experience. Furthermore, you can't see the mouse pointer here, but in this screenshot I'm having my mouse hovered on on of the button selection and sometimes they will be highlighted and selectable, sometimes they don't (like in this screenshot).
Edit: Just saw your edit and I wasn't playing it in fullscreen either.
