When using SC with two displays the interface spans over both monitors, and interface buttons remain unusable (somewhere outside the visible area).
The same thing happens if the other display is switched off, but more than one virtual desktop remains only in that case the interface spans over multiple virtual desktops and is equally unusable.
Maybe this issue does not occur in other than linux-systems (or perhaps only my configuration?).. but it would still be nice to have a possibility to run SC in re-sizable window, if only for testing/debugging purposes.