Two fixes placed by reasoning changed nothing observable, which means the
reasoning was wrong somewhere I cannot see from here. This writes the
numbers into the log rather than a fleeting message, so they can be read
after the fact: the window height, the visible height, and - the one that
settles it - what the scroll box shows against what it contains. Equal, and
there is nothing to scroll, which would be the whole problem.
Temporary. It comes out once the cause is known.
r-zakarya
79a6625613