So here is the 12w39a changelog:
- Lighting system overhauled.
- Lots of blocks interact correctly with lighting now (stairs, slabs)
- Few sound tweaks
- Fixed witch being white for some
- More bugfixes & slight tweaks!
Download the snapshot here:
- Client: https://assets.minecraft.net/12w39a/minecraft.jar
- Server: https://assets.minecraft.net/12w39a/minecraft_server.jar (or EXE)
If you don't have Minecraft you can download the launcher here: https://www.minecraft.net/download
// The Minecraft Team