Steps to reproduce bug:
1) Open My Utmost for His Highest (as an example) - either standalone or in a tab
2) Use any of the methods to scroll: trackpad (two-finger slide), click on arrow scrollbar, use mouse-wheel, up/down arrows
3) No scrolling! (worked in A13)
You CAN drag the slider, but it is not fine enough so you cannot read the day's entry well. I have yet to figure out how many books this affects. My bibles scroll just fine, but that is about it.
Other books where I have had the same bug: New Bible Dictionary, Harper's Bible Dictionary, Treasury of Scripture Knowledge, Bible Knowledge Commentary, Holman Bible Commentary, Teaching Bible Commentary - and I'm finding more.
Oddly, my NICNT is not affected.