Used to be, in full-screen mode, clicking the left mouse button took you forward one page; clicking the right mouse button takes you back one page (that's still the way full screen preferences make it seem it should work). In the latest update, clicking the buttons sometimes advances or takes you back a page, but it sometimes also increases or decreases the zoom. Bug or feature? I don't know, but definitely annoying and needs to go back to the way it was before. Thank you.