Correct accuracy of screenshot
When making a screenshot (a button to send a screenshot in Spark's chat window) it's not grabbing exactly what one has selected. The result of selection is pushed up by ~15 pixels. Also there is no way to grab the whole screen, Spark's UI is in the way. Maybe there shouldn't be any UI (Spark's window titlebar and statusbar) at all when doing a screenshot. Also there could be some indication (a note at the top) telling you that you are in the screenshot mode.
Also see some other issues with screenshots: SPARK-547, SPARK-717,