diff --git a/Spigot-Server-Patches/0167-Process-NMS-Data-Conversion-post-ItemMeta-on-Copy.patch b/Spigot-Server-Patches/0167-Process-NMS-Data-Conversion-post-ItemMeta-on-Copy.patch
index fc6dfcd7fc..3667e504c0 100644
--- a/Spigot-Server-Patches/0167-Process-NMS-Data-Conversion-post-ItemMeta-on-Copy.patch
+++ b/Spigot-Server-Patches/0167-Process-NMS-Data-Conversion-post-ItemMeta-on-Copy.patch
@@ -1,4 +1,4 @@
-From a4bbaeed9543205cae74962e91ad5472309a2054 Mon Sep 17 00:00:00 2001
+From ba3e15745ed9c595c8b787eff25b4092ab524e97 Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Wed, 4 May 2016 22:31:18 -0400
 Subject: [PATCH] Process NMS Data Conversion post ItemMeta on Copy
@@ -14,8 +14,21 @@ erasing the NBT Tag.
 
 On copy, run conversion post ItemMeta apply.
 
+diff --git a/src/main/java/net/minecraft/server/DataInspectorBlockEntity.java b/src/main/java/net/minecraft/server/DataInspectorBlockEntity.java
+index 4a8820e68..27fb802bf 100644
+--- a/src/main/java/net/minecraft/server/DataInspectorBlockEntity.java
++++ b/src/main/java/net/minecraft/server/DataInspectorBlockEntity.java
+@@ -32,7 +32,7 @@ public class DataInspectorBlockEntity implements DataInspector {
+                 boolean flag;
+ 
+                 if (s1 == null) {
+-                    DataInspectorBlockEntity.a.warn("Unable to resolve BlockEntity for ItemInstance: {}", new Object[] { s});
++                    //DataInspectorBlockEntity.a.warn("Unable to resolve BlockEntity for ItemInstance: {}", new Object[] { s}); // Paper - no need to nag about an ok condition
+                     flag = false;
+                 } else {
+                     flag = !nbttagcompound2.hasKey("id");
 diff --git a/src/main/java/net/minecraft/server/ItemStack.java b/src/main/java/net/minecraft/server/ItemStack.java
-index 6697305..1218c00 100644
+index 66973051a..1218c005e 100644
 --- a/src/main/java/net/minecraft/server/ItemStack.java
 +++ b/src/main/java/net/minecraft/server/ItemStack.java
 @@ -55,13 +55,24 @@ public final class ItemStack {
@@ -45,7 +58,7 @@ index 6697305..1218c00 100644
              this.save(savedStack);
              MinecraftServer.getServer().getDataConverterManager().a(DataConverterTypes.ITEM_INSTANCE, savedStack); // PAIL: convert
 diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
-index 4afd3a9..a862e94 100644
+index 4afd3a99a..a862e946c 100644
 --- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
 +++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
 @@ -41,10 +41,11 @@ public final class CraftItemStack extends ItemStack {
@@ -62,5 +75,5 @@ index 4afd3a9..a862e94 100644
      }
  
 -- 
-2.10.2
+2.11.0
 
diff --git a/Spigot-Server-Patches/0185-Optimize-World.isLoaded-BlockPosition-Z.patch b/Spigot-Server-Patches/0185-Optimize-World.isLoaded-BlockPosition-Z.patch
new file mode 100644
index 0000000000..39b7ce63f0
--- /dev/null
+++ b/Spigot-Server-Patches/0185-Optimize-World.isLoaded-BlockPosition-Z.patch
@@ -0,0 +1,23 @@
+From 3fd7a8e63220cb6fe7d57df374d54cfc327b4354 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Fri, 2 Dec 2016 00:11:43 -0500
+Subject: [PATCH] Optimize World.isLoaded(BlockPosition)Z
+
+Reduce method invocations for World.isLoaded(BlockPosition)Z
+
+diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
+index e7ae4c706..51e05f414 100644
+--- a/src/main/java/net/minecraft/server/World.java
++++ b/src/main/java/net/minecraft/server/World.java
+@@ -286,7 +286,7 @@ public abstract class World implements IBlockAccess {
+     }
+ 
+     public boolean isLoaded(BlockPosition blockposition) {
+-        return this.a(blockposition, true);
++        return getChunkIfLoaded(blockposition.getX() >> 4, blockposition.getZ() >> 4) != null; // Paper
+     }
+ 
+     public boolean a(BlockPosition blockposition, boolean flag) {
+-- 
+2.11.0
+
diff --git a/work/CraftBukkit b/work/CraftBukkit
index 9beb0c9968..b64d852496 160000
--- a/work/CraftBukkit
+++ b/work/CraftBukkit
@@ -1 +1 @@
-Subproject commit 9beb0c9968c228788c7bbc446316ccd20e6a0c15
+Subproject commit b64d8524968ef0984bb78dd026192e83b56149d8