Snapshot 12w39a has been Released!

Snapshot 12w39a has been released! This snapshot previews new features that will be in 1.4 and fixes some bugs. It also increases overall performance.

<strong>Complete changelog:</strong>
<ul>
<li>Updated the lighting engine
<ul>
<li>Fixed slab &amp; stair lighting glitches – <a href=”http://imgur.com/v1GlK,ZFdVG#1″>Screenshots</a></li>
<li>Sped up general lighting and performance</li>
<li>Fixed black spots occuring in newly generated worlds</li>
<li>Fixed Nether lighting lag</li>
<li>Added directiona<a href=”https://twitter.com/Dinnerbone/status/250905223713914880″>l</a> lighting</li>
<li>Pistons now let through less light – <a href=”http://i.imgur.com/0J463.png”>Screenshot</a></li>
<li>Slabs, extended pistons and stairs now let through some light</li>
<li>Initial lighting calculations take longer, but have better performance</li>
</ul>
</li>
<li>Few sound tweaks
<ul>
<li>Fixed placing sound for various blocks</li>
</ul>
</li>
<li>Fixed some bugs</li>
</ul>
<h1>Download:</h1>
<a href=”http://assets.minecraft.net/12w39a/minecraft.jar”>Minecraft Snapshot 12w39a</a>
<a href=”http://assets.minecraft.net/12w39a/minecraft_server.jar”>Minecraft Snapshot 12w39a Server</a>

<strong>Installation:</strong>
<ol>
<li>Close Minecraft.</li>
<li>Go to Minecraft.jar. You can find this in Windows at %appdata%/.minecraft/bin.</li>
<li>Copy your Minecraft.jar file and back it up somewhere else.</li>
<li>Move the newly downloaded Minecraft.jar into the /.minecraft/bin folder, replacing the old version.</li>
<li>Open up Minecraft and have fun!</li>
</ol>

Remember, currents mods aren’t compatible with this Snapshot, so backup your Minecraft.jar file if you want to keep your mods.