Once I switched to windowed mode, I discovered that whenever my cursor is out of the window, the game scrolls continuously, based on what direction my cursor is compared to the game window. It doesn't matter if the game is paused or on the 'ESC' menu, it still does this. (And it looks to me like it's doing it even if minimised.)
It's not a huge deal in the sense that there are enough ways to return to a relevant place in the game. I just played one tutorial so far, so I will probably find even more ways. Still, its distracting, and a bit of a time waste (though far as I can tell it shouldn't affect gameplay, since going to the right place is done while the game is paused).
I think it's okay to scroll when the cursor is a little outside the window, because otherwise the scroll region may be too small for comfort in windowed mode, but first of all this should only be done if the game window is in focus, and secondly the distance should be configurable.