Minecraft wiki entry for Development_versions, associated text: MC-3927 – Iron golems can spawn in slabs, glass, farmland and grass path.
MC-74764 – Particle "largeexplode", "hugeexplosion" and "sweepattack" not showing when using the front view (twice F5).
MC-75465 – Vignette effect's visibility is not being updated according to light level when GUI is hidden.
MC-76615 – Lightning bolt summoned by /summon is offset +0.5x and +0.5z.
MC-78963 – Command completion fails with multiple possibilities and other arguments set.
MC-105512 – Cracks appear inside dragon head instead of outside.
MC-114218 – Dispensers and droppers don't offset smoke particles when facing up or down.
MC-119856 – Slime blocks missing cullface argument.
MC-120664 – Tool durability is off by one.
MC-120780 – Chunk data packets are sometimes created unnecessarily.
MC-121152 – WorldClient leaks player and painting entities
MC-122614 – Strange tab completion coloring.
MC-123586 – Debug pie chart uses locale specific number formatting.
MC-123880 – Clientbound play packet 0x0C (Boss Bar) using same byte for different booleans.