This is not a bug as much as it's a bit of very inconvenient UI design. The Tome interface sits very low on the screen (I'm on a 16:9 monitor) such that the "Next Page" and "ALT Exit" buttons slightly overlap. It would probably be a good thing if that were raised several pixels to give some breathing room to the controls.
I'm fresh out of outrage, but I could muster up some amused annoyance if required.