Minecraft 13w39a

Player facing changes when passing through nether portals in certain cases

When scaling a map with paper, shift-clicking on it won't apply the correct scale level.

Mobs visually sinking through solid blocks

Chunks not loading surface, revealing caves, etc.

Misaligned textures on south and east faces for non-full blocks

Zombies and Skeletons don't burn on slabs

Clouds are transparent when you are above/in them but not when you're underneath them.

Walking on blocks less than 1 block tall placed on ice, slime blocks or honey blocks acts like walking on ice, slime block or honey blocks directly

You can attack and be attacked through glass panes

Zombie / Skeleton chestplate not displaying the sleeves of the chestplate properly

Beacon effect removes potion effect of the same type

Ghost End Portal in The End / Missing layer with AMD/ATI graphics cards

Excessive lag on lamp de/activation across chunk borders

Invulnerable boats don't float in lava

Placing a painting "behind" a button makes button unclickable

All arrow types lose their name/NBT data when shot and picked up

Transparent blocks visually use the brighter light level that they are next to

Corner Cobblestone Wall Has Incorrect Collision Box

Thrown Items move after dropped

Snow doesn't form / cannot be placed on upside down slabs / stairs

Left hand covers corner of held map when riding an entity and switching the perspective

Heads, beds, and doors can't be placed where there is thin snow

Mobs do not realize that they can move between fence posts next to nether brick fence.

Black (squares?) on 3rd person view

Ores, dirt and maybe caves and structures only generate until Y 128 in stone

Arrows fired into a repeater / comparator / jukebox / command block / hopper / daylight sensor that is updating will play the arrow hitting a block noise

Zombie pigmen/burnable mobs in the sun use up helmets

Signs, Sugar Cane, Vines, Two-block Plants and Cobwebs cause glitchy mob behavior

Player facing changes when passing through nether portals in certain cases

When scaling a map with paper, shift-clicking on it won't apply the correct scale level.

Mobs visually sinking through solid blocks

Chunks not loading surface, revealing caves, etc.

Misaligned textures on south and east faces for non-full blocks

Zombies and Skeletons don't burn on slabs

Clouds are transparent when you are above/in them but not when you're underneath them.

Walking on blocks less than 1 block tall placed on ice, slime blocks or honey blocks acts like walking on ice, slime block or honey blocks directly

You can attack and be attacked through glass panes

Zombie / Skeleton chestplate not displaying the sleeves of the chestplate properly

Beacon effect removes potion effect of the same type

Ghost End Portal in The End / Missing layer with AMD/ATI graphics cards

Excessive lag on lamp de/activation across chunk borders

Invulnerable boats don't float in lava

Placing a painting "behind" a button makes button unclickable

All arrow types lose their name/NBT data when shot and picked up

Transparent blocks visually use the brighter light level that they are next to

Corner Cobblestone Wall Has Incorrect Collision Box

Thrown Items move after dropped

Snow doesn't form / cannot be placed on upside down slabs / stairs

Left hand covers corner of held map when riding an entity and switching the perspective

Heads, beds, and doors can't be placed where there is thin snow

Mobs do not realize that they can move between fence posts next to nether brick fence.

Black (squares?) on 3rd person view

Ores, dirt and maybe caves and structures only generate until Y 128 in stone

Arrows fired into a repeater / comparator / jukebox / command block / hopper / daylight sensor that is updating will play the arrow hitting a block noise

Zombie pigmen/burnable mobs in the sun use up helmets

Signs, Sugar Cane, Vines, Two-block Plants and Cobwebs cause glitchy mob behavior