Minecraft wiki entry for Development_versions, associated text: MC-135381 – Conduits can not be placed outside of water.
MC-135385 – Entities fall through the entire world when they are inside blocks.
MC-135387 – Chunks are not forced/unforced until a player loads it.
MC-135390 – Pistons react inconsistently to certain 4 gametick pulses.
MC-135423 – Can't stand on top of boat anymore without glitching.
MC-135431 – Scoreboard division is inconsistent with modulo.