diff --git a/README.md b/README.md
index 7c95952..e45ddff 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ DoubleDoorDevelopment Core
 
 Download from our [website](http://doubledoordev.net/) or our [jenkins server](https://jenkins.dries007.net/view/D3_mods/)
 
-Big thanks to @mallrat208 for updating to 1.9 / 1.10
+Big thanks to @mallrat208 for updating to 1.9 / 1.10 / 1.11.2
 
 Materials
 ---------
diff --git a/src/main/java/net/doubledoordev/d3core/util/CoreConstants.java b/src/main/java/net/doubledoordev/d3core/util/CoreConstants.java
index 1d23345..443f624 100644
--- a/src/main/java/net/doubledoordev/d3core/util/CoreConstants.java
+++ b/src/main/java/net/doubledoordev/d3core/util/CoreConstants.java
@@ -50,7 +50,7 @@
 public class CoreConstants
 {
     public static final String MODID = "d3core";
-    public static final String NAME = "D³ Core";
+    public static final String NAME = "D³Core";
     public static final String BASE_URL = "http://doubledoordev.net/";
     public static final String PERKS_URL = BASE_URL + "perks.json";
     public static final String UPDATE_URL = BASE_URL + MODID + ".json";
diff --git a/src/main/java/net/doubledoordev/d3core/util/Materials.java b/src/main/java/net/doubledoordev/d3core/util/Materials.java
index 3b9c7b8..f3daa97 100644
--- a/src/main/java/net/doubledoordev/d3core/util/Materials.java
+++ b/src/main/java/net/doubledoordev/d3core/util/Materials.java
@@ -93,11 +93,17 @@ public static void load() throws IOException
                 continue;
             }
             ItemStack stack = new ItemStack(item, stacksize, meta);
+            if (stack.isEmpty()) // Technically, the previous if should have failed, but I'm not taking chances here.
+            {
+                D3Core.getLogger().error("Entry in materials.json {} invalid. Item {}:{} does not exist.", entry, mod, name);
+                stop = true;
+                continue;
+            }
             itemStackMap.put(entry.getKey().toLowerCase(), stack);
         }
         if (stop)
         {
-            D3Core.getLogger().error("The proper format for materials.json entries is (in regex): {}", CoreConstants.PATTERN_ITEMSTACK.pattern());
+            D3Core.getLogger().fatal("The proper format for materials.json entries is (in regex): {}", CoreConstants.PATTERN_ITEMSTACK.pattern());
             RuntimeException e = new RuntimeException("You have invalid entries in your materials.json file. Check the log for more info.");
             e.setStackTrace(new StackTraceElement[0]); // No need for this
             throw e;
@@ -106,8 +112,22 @@ public static void load() throws IOException
         for (ToolMaterial material : ToolMaterial.values())
         {
             ItemStack stack = itemStackMap.get(material.name().toLowerCase());
-            if (stack == ItemStack.EMPTY || material.getRepairItemStack() != ItemStack.EMPTY) continue;
+            if (stack == null) continue; // null if no entry in map
+
+            if (!material.getRepairItemStack().isEmpty()) // No longer allowed by Forge.
+            {
+                D3Core.getLogger().fatal("Material {} already has {} as repair material. You cannot override it.", material.name(), material.getRepairItemStack());
+                stop = true;
+                continue;
+            }
             material.setRepairItem(stack);
         }
+        if (stop)
+        {
+            D3Core.getLogger().fatal("You tried to set the repair stack of a ToolMaterial that already has one. This is not allowed by Forge.");
+            RuntimeException e = new RuntimeException("You tried to set the repair stack of a ToolMaterial that already has one. This is not allowed by Forge. Check the log for more info.");
+            e.setStackTrace(new StackTraceElement[0]); // No need for this
+            throw e;
+        }
     }
 }
diff --git a/src/main/resources/mcmod.info b/src/main/resources/mcmod.info
index 1602cfa..6390edc 100644
--- a/src/main/resources/mcmod.info
+++ b/src/main/resources/mcmod.info
@@ -1,7 +1,7 @@
 {
   "modListVersion": 2,
   "modList": [{
-    "modid": "D3Core",
+    "modid": "d3core",
     "name": "D³Core",
     "description": "${description}",
     "version": "${version}",