okay....

java.lang.ClassCastException: li.cil.oc.common.tileentity.Case cannot be cast to mekanism.common.tile.TileEntityBasicBlock
	at mekanism.common.block.BlockMachine.func_149749_a(BlockMachine.java:330)
	at net.minecraft.world.chunk.Chunk.func_150807_a(Chunk.java:600)
	at net.minecraft.world.World.func_147465_d(World.java:451)
	at net.minecraft.world.World.func_147468_f(World.java:573)
	at mekanism.common.block.BlockMachine.removedByPlayer(BlockMachine.java:801)
	at net.minecraft.server.management.ItemInWorldManager.removeBlock(ItemInWorldManager.java:247)
	at net.minecraft.server.management.ItemInWorldManager.func_73079_d(ItemInWorldManager.java:240)
	at net.minecraft.server.management.ItemInWorldManager.func_73084_b(ItemInWorldManager.java:278)
	at net.minecraft.server.management.ItemInWorldManager.func_73074_a(ItemInWorldManager.java:151)
	at net.minecraft.network.NetHandlerPlayServer.func_147345_a(NetHandlerPlayServer.java:489)
	at net.minecraft.network.play.client.C07PacketPlayerDigging.func_148833_a(SourceFile:53)
	at net.minecraft.network.play.client.C07PacketPlayerDigging.func_148833_a(SourceFile:8)
	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)
	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
	at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:111)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:396)
	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)