Minecraft wiki entry for Development_versions, associated text: MC-13626 – XP Bar shows up in creative.
MC-13640 – Hay bales do not burn when set on fire.
MC-13662 – XP, health, and hunger bar are buggy with horses.
MC-13770 – Using a horse spawn egg on a horse works only when riding the horse.
MC-13852 – Can't throw enderpearls while mounting a horse.
MC-14220 – Player appearance not updating in multiplayer (armor, tools).
MC-14417 – No way to remove armor or saddles off a horse.
MC-14422 – Horse name tag is shown while riding.
MC-15138 – Sides of cauldron has compass texture after placing compass in item frame.
MC-15201 – Bottom part of some types of horses-harness is misplaced.