When I first click in a bible window to make it active and then hit the spacebar, the window scrolls by a page at a time.
If I then click on the next/previous arrow, which I have set to "verse", any spacebar presses after that, cause the window to scroll by a verse. (Note: if the setting is to book, then the spacebar scrolls a book at a time, similarly for chapter and article)
If I then click outside the bible pane so it looses focus, then click back on the window, the space bar has reverted to scrolling by a page at a time again.
I think the space bar should always default to one or the other, or there should be some indication what the action of the spacebar currently is.