Or if the dividing line was twenty times thicker. When pages are narrow, my brain tends to start reading the next line before it is finished reading the first line. Imagine how well this works out for me when the "next line" is not only from the previous page, but currently cut in half by the scroll line.

Yes! That was the 1st thing I thought as well. If you could make the previous text disappear or set it at 30% opacity it wouldn't even ned a divider. I like the way this reads. I'd like to see it as a feature for iBooks / e-readers.