One block high glass panes no longer serve as a fence. You walk into them and bounce up and keep walking over them. Keep that in mind for those who use it like a fence.
Edit: Looks like that is true for more than just glass. I'm auto-climbing everything now. Is this a setting we can change or a carry over from the mobile version of the game?
Edit 2!: L looks like Auto-Jump is enabled by default. Turn it off in Controls and you should be fine:
Louis L'Amour, “To make democracy work, we must be a nation of participants, not simply observers.
One who does not vote has no right to complain.”
Visit our archived Minecraft world! | Maybe someday I'll proof read, until then deal with it.