Ok, I see it. There is a narrow bar running along the bottom of the page that moves to the right when you go to the next page.
It's definitely unobtrusive. So unobtrusive I missed it to begin with.
I do like it as it doesn't impinge on the reading experience, just took me a while to realise it was there. Now I've found it, it's fine.
Good for tracking the progress in the chapter, just like what Aldiko used to use before they upgraded to v2.0.
Is there also the possibility of having a book progress as well, preferably as unobtrusive as the chapter progress bar?
I know I'm being greedy and wanting both, but I think it's good to have it as well.