Minecraft 1.3.6 [ PreRelease 6 ] 12w21a - JKoop

Time for a new snapshot! One big difference this time is that you don?t need the server jar to play single-player. Also,
1. Villagers will trade items (they are cheap bastards, though!)

2. Added a currency item

3. A few minor terrain changes

4. A new useful block/item (requires obsidian)

5. Added a /seed command for showing the map seed

6. Added sandstone stairs

7. A lot of smaller changes and fixes
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INSTALL INSTRUCTIONS
Windows-

1. Type %appdata% in the search bar

2. .minecraft/bin

3. Drag the minecraft.jar file into the /bin folder

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MAC -

1. goto Finder/User/Library/Application Support/minecraft

2. FOLLOW STEPS 2-3 above.