When using the middle-mousebutton scrolling (click and move around) the column indicator line leaves artifacts which are not removed when scrolling is done. The line is also drawn in wrong positions.
i am clicking and releasing the middle mouse button to get the 4 way scrolling "icon" drawn in the middle of the editor. moving the mouse then scrolls me both vertically and horizontally.
when scrolling sideways the indicator column is being redrawn correctly. however when scrolling vertically the dots merge together to form a solid vertical line.