--- ../src-base/minecraft/cpw/mods/fml/common/FMLCommonHandler.java
+++ ../src-work/minecraft/cpw/mods/fml/common/FMLCommonHandler.java
@@ -37,6 +37,10 @@
 
 import org.apache.logging.log4j.Level;
 import org.apache.logging.log4j.Logger;
+import org.bukkit.Bukkit;
+import org.bukkit.craftbukkit.CraftWorld;
+import org.bukkit.entity.Player;
+import org.bukkit.event.player.PlayerChangedWorldEvent;
 
 import com.google.common.base.Joiner;
 import com.google.common.base.Strings;
@@ -282,6 +286,7 @@
     {
         Loader.instance().serverStarted();
         sidedDelegate.allowLogins();
+        kcauldron.updater.KVersionRetriever.init(MinecraftServer.getServer());
     }
 
     public void handleServerStopping()
@@ -385,10 +390,11 @@
         {
             return;
         }
-        if (handlerSet.contains(handler))
+        if (handlerSet.contains(handler) || worldInfo.getDimension() != 0) // Cauldron - Only check FML data in main world
         {
             return;
         }
+        // Cauldron - logic below should only be run for overworld as Forge/Vanilla only use 1 SaveHandler
         handlerSet.add(handler);
         handlerToCheck = new WeakReference<SaveHandler>(handler); // for confirmBackupLevelDatUse
         Map<String,NBTBase> additionalProperties = Maps.newHashMap();
@@ -496,7 +502,13 @@
 
     public String getModName()
     {
-        List<String> modNames = Lists.newArrayListWithExpectedSize(3);
+        // Cauldron start    
+        List<String> modNames = Lists.newArrayListWithExpectedSize(6);
+        modNames.add("kcauldron");
+        modNames.add("cauldron");
+        modNames.add("craftbukkit");
+        modNames.add("mcpc");
+        // Cauldron end
         modNames.add("fml");
         if (!noForge)
         {
@@ -540,8 +552,17 @@
         bus().post(new InputEvent.KeyInputEvent());
     }
 
+    // Cauldron start - wrapper to notify plugins for mods that bypass ServerConfigurationManager
     public void firePlayerChangedDimensionEvent(EntityPlayer player, int fromDim, int toDim)
     {
+        this.firePlayerChangedDimensionEvent(player, fromDim, toDim, player.worldObj.getWorld());
+    }
+
+    public void firePlayerChangedDimensionEvent(EntityPlayer player, int fromDim, int toDim, CraftWorld fromWorld)
+    {
+        PlayerChangedWorldEvent event = new PlayerChangedWorldEvent((Player) player.getBukkitEntity(), fromWorld);
+        Bukkit.getServer().getPluginManager().callEvent(event);
+        // Cauldron end
         bus().post(new PlayerEvent.PlayerChangedDimensionEvent(player, fromDim, toDim));
     }