diff --git a/src/com/onarandombox/MultiverseCore/MVWorld.java b/src/com/onarandombox/MultiverseCore/MVWorld.java
index b7bca350..988cde96 100644
--- a/src/com/onarandombox/MultiverseCore/MVWorld.java
+++ b/src/com/onarandombox/MultiverseCore/MVWorld.java
@@ -50,6 +50,7 @@ public class MVWorld {
         this.generator = world.getGenerator();
         this.generatorString = generatorString;
         this.seed = seed;
+        this.environment = world.getEnvironment();
         
         this.initLists();
         
@@ -78,7 +79,7 @@ public class MVWorld {
         
         this.setRealMobBehaviors();
         
-        config.setProperty("worlds." + this.name + ".environment", world.getEnvironment());
+        config.setProperty("worlds." + this.name + ".environment", this.environment);
         config.setProperty("worlds." + this.name + ".generatorString",generatorString);
         if (seed != null) {
             config.setProperty("worlds." + this.name + ".seed", this.seed);
diff --git a/src/com/onarandombox/MultiverseCore/MultiverseCore.java b/src/com/onarandombox/MultiverseCore/MultiverseCore.java
index 78d8bc5f..c27fb8ff 100644
--- a/src/com/onarandombox/MultiverseCore/MultiverseCore.java
+++ b/src/com/onarandombox/MultiverseCore/MultiverseCore.java
@@ -393,7 +393,7 @@ public class MultiverseCore extends JavaPlugin {
     public boolean addWorld(String name, Environment env, String seedString, String generator) {
         
         Long seed = null;
-        if (seedString.length() > 0) {
+        if (seedString != null && seedString.length() > 0) {
             try {
                 seed = Long.parseLong(seedString);
             } catch (NumberFormatException numberformatexception) {