Minecraft wiki entry for Development_versions, associated text: MC-92 – Slab and stairs lighting incorrect
MC-46667 – Light Level in F3 not correct on slabs, stairs, farmland, and grass path
MC-83277 – Entities render black when enclosed in slabs (or other blocks)
MC-99863 – Line breaks different in signed book
MC-116448 – Illusioner is missing its loot table
MC-129926 – Light glitch with slabs
MC-131553 – Iron horse armor is misaligned at the head
MC-132701 – Lighting is broken on world load
MC-134063 – Wood blocks have wrong color on maps
MC-137266 – Colon in 'Direct Connect' menu crashes game
MC-139141 – Mushroom stem blocks changed color on maps