java.lang.ClassCastException: TFC.Blocks.BlockCustomStairs cannot be cast to akw
	at azd.b(RenderBlocks.java:550)
	at ayp.a(WorldRenderer.java:282)
	at ayy.a(RenderGlobal.java:1583)
	at ayt.a(EntityRenderer.java:1537)
	at ayt.b(EntityRenderer.java:1118)
	at net.minecraft.client.Minecraft.J(Minecraft.java:884)
	at net.minecraft.client.Minecraft.run(Minecraft.java:779)
	at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT fb7489d3 ----------