Minecraft wiki entry for Development_versions, associated text: Item frames converted from blocks to entities
Enchanted Apples are now uncraftable
Items can now travel upwards through solid blocks, allowing for 3x3 item elevators
Beacon light beams change color when going through stained glass and stained glass panes[9]
Ice is now transparent
Stained glass and stained glass panes now have their own textures, and are obtainable without the use of inventory editors.
Version exclusive: Player heads now appear on maps
Version exclusive: Changed the inventory icons for glass panes, stained glass panes, and iron bars
Locator maps now track the owner's position, regardless of dimension
Banners now spawn on end cities
Observer blocks have updated textures and will now blink red when outputting a redstone pulse
Bricks, nether bricks, and clay blocks have been renamed to better differentiate from other items
Single glass panes, stained glass panes, and iron bars are now rod-shaped
Replaced grassless dirt with Coarse Dirt.