When the statusbar and/or command line are visible, the bottom edge of the viewport that contains the document and scrollbars doesn't seem to be adjusted upwards to accomodate them - instead the statusbar and command line are overlaid on that viewport, which has various awkward consequences:

• the horizontal scrollbar is completely hidden, and the bottom end of the vertical scrollbar is partially obscured
• you can't see the very bottom of a document, even after scrolling right to end
• the page scrolling commands appear inaccurate, eg. if you configure scroll-full-overlap to 0, then a full-up or full-down scroll still appears to move less than a full page

Could the bottom of the document and scrollbars container be nudged upwards to stay clear any added bars at the bottom?