The scrollbars on gtop's process memory map dialog start flickering
hysterically and turn the cursor into a DND icon when I try to drag them,
and the scroller doesn't move.. If I click in the empty regions, it
flickers a little less violently and the cursor is only briefly turned into
a dragging sheet of paper, only then permitting the scrollbar to page up or
down.

The problem is worse on the Raw Memory Map tab than it is on the Graphical
Memory Map tab.