D:\>java -Xmx2048M -Xms2048M -jar d:\minecraft.jar  1>d:\minecraft.log
java.lang.ClassCastException: BlockMossy cannot be cast to qy
        at vl.a(RenderBlocks.java:3814)
        at vl.o(RenderBlocks.java:3329)
        at vl.b(RenderBlocks.java:406)
        at ct.a(WorldRenderer.java:312)
        at l.a(RenderGlobal.java:1464)
        at lr.a(EntityRenderer.java:1119)
        at lr.b(EntityRenderer.java:951)
        at EntityRendererProxy.b(EntityRendererProxy.java:21)
        at net.minecraft.client.Minecraft.x(Minecraft.java:843)
        at net.minecraft.client.Minecraft.run(Minecraft.java:699)
        at java.lang.Thread.run(Unknown Source)