24 new blocks and items were added to Minecraft 1.4 java edition.
Pretty Scary Update
The Pretty Scary Update added the new scary mobs, witches, bats, zombie villagers, and wither skeletons. It was also a tasty update adding potatoes, pumpkin pie and carrots.
Technical blocks that can't be placed in inventory, can be placed in world by /setblock. Not included in our new block count, as usually a version of an item.