Add my "fix" for EntityPersistance, I do believe that removing this check is incorrect and the result of a slight hiccup by Bukkit.

CraftBukkit-Patches/0065-Fix-Entity-Persistance.patch

@@ -0,0 +1,22 @@
+From 60f414fa65a5d1d43bbc7174ab8f747ad49d1dc9 Mon Sep 17 00:00:00 2001
+From: md_5 <md_5@live.com.au>
+Date: Fri, 5 Jul 2013 21:55:00 +1000
+Subject: [PATCH] Fix Entity Persistance
+
+
+diff --git a/src/main/java/net/minecraft/server/EntityInsentient.java b/src/main/java/net/minecraft/server/EntityInsentient.java
+index f913a40..a91c5d6 100644
+--- a/src/main/java/net/minecraft/server/EntityInsentient.java
++++ b/src/main/java/net/minecraft/server/EntityInsentient.java
+@@ -390,7 +390,7 @@ public abstract class EntityInsentient extends EntityLiving {
+                 double d2 = entityhuman.locZ - this.locZ;
+                 double d3 = d0 * d0 + d1 * d1 + d2 * d2;
+ 
+-                if (d3 > 16384.0D) { // CraftBukkit - remove isTypeNotPersistent() check
++                if (this.isTypeNotPersistent() && d3 > 16384.0D) { // Spigot - md_5: I think CraftBukkit dun derped by altering this
+                     this.die();
+                 }
+ 
+-- 
+1.8.1.2
+