Minecraft wiki entry for Development_versions, associated text: MC-1058 – A dragon head is invisible if the entity wearing it is not in view.
MC-2404 – Stepping down while sneaking allows falling off of blocks.
MC-49476 – NBT HideFlags does not hide "Dyed" on leather armor.
MC-68487 – Player heads of the same player always have the same skin texture, even if the saved texture data is different.
MC-97507 – Using item which modifies the held item shows "Gear equips" subtitle.
MC-145691 – Binding "Open/Close Inventory" to Tab ↹ only opens the inventory.
MC-150417 – Some items get stuck in soul sand when there is liquid above the soul sand.
MC-160723 – Bamboo crouch sliding off.
MC-180447 – Game crashes when placing player head down.