This isn't really a bug; I'm posting this just to show you guys I remember seeing this awhile ago. I saw two stacks of leaves in my storage - one called "Oak Leaves" and the other called "Oak Leaves"... one had the color of oak leaves and the other one had a birch leaf color. When I found these leaves (about a year and a half ago), I asked, "Why do my oak leaves look like birch leaves?" ..someone, whom I can't remember, answered with something like their code was changed or something when the new update came out This will explain it better: There are some old blocks with old IDs. These blocks will not show up when in your hand, in your inventory or chest; in an item frame, or on the ground. But wait! #0018/6 doesn't exist! This is the item in Minecraft 1.7.10. in an item frame:
Also certain types of mushroom blocks and wooden slabs are now deprecated and will have their textures removed. If you'd like to test it on singleplayer type this: /give @p minecraft:leaves 1 18
