Minecraft Snapshot 12w39a released, fixes lighting bugs

Today is Thursday, meaning a new Minecraft snapshot is released. This week has a few cool new things in it, like some tweaks to the new sounds, witch fixes, and a few other features. The biggest addition in this release is fixing a majority of lighting errors. You may have noticed with slabs or stairs that they look much darker than the room in some cases. That's exactly what's being fixed, along with a plethora of others. Smooth lighting is broken in some areas for now, but that will likely change come next week. Get the download at the source link below.

Source: Mojang