diff --git a/src/main/java/StevenDimDoors/mod_pocketDim/mod_pocketDim.java b/src/main/java/StevenDimDoors/mod_pocketDim/mod_pocketDim.java
index c44eaeef..a4e68444 100644
--- a/src/main/java/StevenDimDoors/mod_pocketDim/mod_pocketDim.java
+++ b/src/main/java/StevenDimDoors/mod_pocketDim/mod_pocketDim.java
@@ -61,6 +61,7 @@ import StevenDimDoors.mod_pocketDim.tileentities.TileEntityRift;
 import StevenDimDoors.mod_pocketDim.tileentities.TileEntityTransTrapdoor;
 import StevenDimDoors.mod_pocketDim.world.BiomeGenLimbo;
 import StevenDimDoors.mod_pocketDim.world.BiomeGenPocket;
+import StevenDimDoors.mod_pocketDim.world.DDBiomeGenBase;
 import StevenDimDoors.mod_pocketDim.world.LimboProvider;
 import StevenDimDoors.mod_pocketDim.world.PocketProvider;
 import StevenDimDoors.mod_pocketDim.world.gateways.GatewayGenerator;
@@ -207,6 +208,11 @@ public class mod_pocketDim
 		itemStabilizedLinkSignature = (new ItemStabilizedRiftSignature(properties.StabilizedRiftSignatureItemID)).setUnlocalizedName("itemStabilizedRiftSig");
 		itemWorldThread = (new ItemWorldThread(properties.WorldThreadItemID)).setUnlocalizedName("itemWorldThread");
 		
+		// Check if other biomes have been registered with the same IDs we want. If so, crash Minecraft
+		// to notify the user instead of letting it pass and conflicting with Biomes o' Plenty.
+		DDBiomeGenBase.checkBiomes( new int[] { properties.LimboBiomeID, properties.PocketBiomeID } );
+
+		// Initialize our biomes
 		mod_pocketDim.limboBiome = (new BiomeGenLimbo(properties.LimboBiomeID));
 		mod_pocketDim.pocketBiome = (new BiomeGenPocket(properties.PocketBiomeID));
 
@@ -282,7 +288,10 @@ public class mod_pocketDim
 
 	@EventHandler
 	public void onPostInitialization(FMLPostInitializationEvent event)
-	{	
+	{
+		// Check in case other mods have registered over our biome IDs
+		DDBiomeGenBase.checkBiomes( new int[] { properties.LimboBiomeID, properties.PocketBiomeID } );
+		
 		ForgeChunkManager.setForcedChunkLoadingCallback(instance, new ChunkLoaderHelper());
 	}
 	
diff --git a/src/main/java/StevenDimDoors/mod_pocketDim/world/BiomeGenLimbo.java b/src/main/java/StevenDimDoors/mod_pocketDim/world/BiomeGenLimbo.java
index 243baf17..77eef463 100644
--- a/src/main/java/StevenDimDoors/mod_pocketDim/world/BiomeGenLimbo.java
+++ b/src/main/java/StevenDimDoors/mod_pocketDim/world/BiomeGenLimbo.java
@@ -2,38 +2,10 @@ package StevenDimDoors.mod_pocketDim.world;
 
 import net.minecraft.world.biome.BiomeGenBase;
 
-public class BiomeGenLimbo extends BiomeGenBase
+public class BiomeGenLimbo extends DDBiomeGenBase
 {
-	public BiomeGenLimbo(int par1)
+	public BiomeGenLimbo(int biomeID)
     {
-        super(par1);
-        this.theBiomeDecorator.treesPerChunk = 0;
-        this.theBiomeDecorator.flowersPerChunk = 0;
-        this.theBiomeDecorator.grassPerChunk = 0;
-        this.setBiomeName("Limbo");
-        this.setDisableRain();
-        
-        this.spawnableMonsterList.clear();
-        this.spawnableCreatureList.clear();
-        this.spawnableWaterCreatureList.clear();
-        this.spawnableCaveCreatureList.clear();
-      //  this.spawnableMonsterList.add(new SpawnListEntry(MobObelisk.class, 1, 1, 1));
-       // this.spawnableMonsterList.add(new SpawnListEntry(MobObelisk.class, 300, 0, 0));
-
-      //  this.spawnableCreatureList.add(new SpawnListEntry(MobObelisk.class, 1, 1, 1));
-      //  this.spawnableCreatureList.add(new SpawnListEntry(MobObelisk.class, 300, 0, 0));
-
-      //  this.spawnableCaveCreatureList.add(new SpawnListEntry(MobObelisk.class, 1, 1, 1));
-     //   this.spawnableCaveCreatureList.add(new SpawnListEntry(MobObelisk.class, 300, 0, 0));
-
-
-
-
-    }
-    
-    @Override
-	public float getSpawningChance()
-    {
-        return 0.00001F;
+        super(biomeID, "Limbo");
     }
 }
diff --git a/src/main/java/StevenDimDoors/mod_pocketDim/world/BiomeGenPocket.java b/src/main/java/StevenDimDoors/mod_pocketDim/world/BiomeGenPocket.java
index e9dbdb76..8d09b7be 100644
--- a/src/main/java/StevenDimDoors/mod_pocketDim/world/BiomeGenPocket.java
+++ b/src/main/java/StevenDimDoors/mod_pocketDim/world/BiomeGenPocket.java
@@ -2,26 +2,10 @@ package StevenDimDoors.mod_pocketDim.world;
 
 import net.minecraft.world.biome.BiomeGenBase;
 
-public class BiomeGenPocket extends BiomeGenBase
+public class BiomeGenPocket extends DDBiomeGenBase
 {
-	public BiomeGenPocket(int par1)
+	public BiomeGenPocket(int biomeID)
     {
-        super(par1);
-        this.theBiomeDecorator.treesPerChunk = 0;
-        this.theBiomeDecorator.flowersPerChunk = 0;
-        this.theBiomeDecorator.grassPerChunk = 0;
-        this.setBiomeName("Pocket Dimension");
-        this.setDisableRain();
-        
-        this.spawnableMonsterList.clear();
-        this.spawnableCreatureList.clear();
-        this.spawnableWaterCreatureList.clear();
-        this.spawnableCaveCreatureList.clear();
-     //   this.spawnableMonsterList.add(new SpawnListEntry(MobObelisk.class, 1, 1, 1));
-     //   this.spawnableCreatureList.add(new SpawnListEntry(MobObelisk.class, 1, 1, 1));
-//
-     //   this.spawnableCaveCreatureList.add(new SpawnListEntry(MobObelisk.class, 1, 1, 1));
-
-
+        super(biomeID, "Pocket Dimension");
     }
 }
diff --git a/src/main/java/StevenDimDoors/mod_pocketDim/world/DDBiomeGenBase.java b/src/main/java/StevenDimDoors/mod_pocketDim/world/DDBiomeGenBase.java
new file mode 100644
index 00000000..f6e34281
--- /dev/null
+++ b/src/main/java/StevenDimDoors/mod_pocketDim/world/DDBiomeGenBase.java
@@ -0,0 +1,34 @@
+package StevenDimDoors.mod_pocketDim.world;
+
+import net.minecraft.world.biome.BiomeGenBase;
+
+public class DDBiomeGenBase extends BiomeGenBase
+{
+	public DDBiomeGenBase(int biomeID, String name)
+    {
+        super(biomeID);
+        this.setBiomeName(name);
+        this.theBiomeDecorator.treesPerChunk = 0;
+        this.theBiomeDecorator.flowersPerChunk = 0;
+        this.theBiomeDecorator.grassPerChunk = 0;
+        this.setDisableRain();
+        
+        this.spawnableMonsterList.clear();
+        this.spawnableCreatureList.clear();
+        this.spawnableWaterCreatureList.clear();
+        this.spawnableCaveCreatureList.clear();
+    }
+
+	public static void checkBiomes(int[] biomes)
+	{
+		for (int k = 0; k < biomes.length; k++)
+		{
+			if (biomeList[biomes[k]] != null && !(biomeList[biomes[k]] instanceof DDBiomeGenBase))
+			{
+				// Crash Minecraft to avoid having people complain to us about strange things
+				// that are really the result of silent biome ID conflicts.
+				throw new IllegalStateException("There is a biome ID conflict between a biome from Dimensional Doors and another biome type. Fix your configuration!");
+			}
+		}
+	}
+}