Minecraft wiki entry for Development_versions, associated text: Spruce, birch and jungle wooden stairs can now be crafted.
Removed sand and gravel duplication glitch.
In creative mode, destroying a TNT block no longer drops a TNT block.
Fixed changing the name of a world, loading that world, saving and quitting it undoing the world rename.
Fixed game crashing when it automatically selects the "Scanning for LAN Worlds" item in the server list and you delete it.
Fixed arrow representing the player on the map item not pointing in the right direction.
Fixed clicking "Save and Quit" or "Disconnect" twice quickly crashing the game.
Fixed the multiplayer server fairly regularly dropping all players and showing many NullPointerExceptions in the console every few hours.
Fixed save files being closed each time world was auto-saved.
Fixed placing a piston in front of another which is powered, but not extended, causing the placed piston to become a Weird Piston and have the metadata value 7.
Removed powered rail duplication glitch.