I logged into the game after updating to the latest version next to my beacon with a Jump Boost II perk, and quickly realized that I was taking slight amounts of fall damage when I jumped, even when I landed on the same level that I jumped from.
Environment
Windows 8
Java version 7, update 60.
No mods
Intended. This issue has been reported already. It has been linked to the original bugreport.
Please search before reporting any bugs, as it's likely that one exists already.