diff --git a/OpenSim/Region/Framework/Scenes/EventManager.cs b/OpenSim/Region/Framework/Scenes/EventManager.cs
index 4906665cbe..4a4d98fa74 100644
--- a/OpenSim/Region/Framework/Scenes/EventManager.cs
+++ b/OpenSim/Region/Framework/Scenes/EventManager.cs
@@ -98,9 +98,10 @@ namespace OpenSim.Region.Framework.Scenes
 
         public event OnPluginConsoleDelegate OnPluginConsole;
 
-        public delegate void OnShutdownDelegate();
-
-        public event OnShutdownDelegate OnShutdown;
+        /// <summary>
+        /// Triggered when the entire simulator is shutdown.
+        /// </summary>
+        public event Action OnShutdown;
         
         public delegate void ObjectDeGrabDelegate(uint localID, uint originalID, IClientAPI remoteClient, SurfaceTouchEventArgs surfaceArgs);
         public delegate void ScriptResetDelegate(uint localID, UUID itemID);
@@ -113,9 +114,14 @@ namespace OpenSim.Region.Framework.Scenes
 
         public event ParcelPropertiesUpdateRequest OnParcelPropertiesUpdateRequest;
 
-        public delegate void SceneShuttingDownDelegate(Scene scene);
-
-        public event SceneShuttingDownDelegate OnSceneShuttingDown;
+        /// <summary>
+        /// Triggered when an individual scene is shutdown.
+        /// </summary>
+        /// <remarks>
+        /// This does not automatically mean that the entire simulator is shutting down.  Listen to OnShutdown for that
+        /// notification.
+        /// </remarks>
+        public event Action<Scene> OnSceneShuttingDown;
 
         /// <summary>
         /// Fired when an object is touched/grabbed.
@@ -869,10 +875,10 @@ namespace OpenSim.Region.Framework.Scenes
 
         public void TriggerShutdown()
         {
-            OnShutdownDelegate handlerShutdown = OnShutdown;
+            Action handlerShutdown = OnShutdown;
             if (handlerShutdown != null)
             {
-                foreach (OnShutdownDelegate d in handlerShutdown.GetInvocationList())
+                foreach (Action d in handlerShutdown.GetInvocationList())
                 {
                     try
                     {
@@ -2212,10 +2218,10 @@ namespace OpenSim.Region.Framework.Scenes
 
         public void TriggerSceneShuttingDown(Scene s)
         {
-            SceneShuttingDownDelegate handler = OnSceneShuttingDown;
+            Action<Scene> handler = OnSceneShuttingDown;
             if (handler != null)
             {
-                foreach (SceneShuttingDownDelegate d in handler.GetInvocationList())
+                foreach (Action<Scene> d in handler.GetInvocationList())
                 {
                     try
                     {
diff --git a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
index 1c16c8736f..12e1a78871 100644
--- a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
+++ b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
@@ -90,6 +90,11 @@ namespace OpenSim.Region.ScriptEngine.XEngine
         private bool m_KillTimedOutScripts;
         private string m_ScriptEnginesPath = null;
 
+        /// <summary>
+        /// Is the entire simulator in the process of shutting down?
+        /// </summary>
+        private bool m_SimulatorShuttingDown;
+
         private static List<XEngine> m_ScriptEngines =
                 new List<XEngine>();
 
@@ -470,17 +475,22 @@ namespace OpenSim.Region.ScriptEngine.XEngine
                     //
                     instance.DestroyScriptInstance();
 
-                    // Unload scripts and app domains
+                    // Unload scripts and app domains.
                     // Must be done explicitly because they have infinite
-                    // lifetime
-                    //
-                    m_DomainScripts[instance.AppDomain].Remove(instance.ItemID);
-                    if (m_DomainScripts[instance.AppDomain].Count == 0)
+                    // lifetime.
+                    // However, don't bother to do this if the simulator is shutting
+                    // down since it takes a long time with many scripts.
+                    if (!m_SimulatorShuttingDown)
                     {
-                        m_DomainScripts.Remove(instance.AppDomain);
-                        UnloadAppDomain(instance.AppDomain);
+                        m_DomainScripts[instance.AppDomain].Remove(instance.ItemID);
+                        if (m_DomainScripts[instance.AppDomain].Count == 0)
+                        {
+                            m_DomainScripts.Remove(instance.AppDomain);
+                            UnloadAppDomain(instance.AppDomain);
+                        }
                     }
                 }
+
                 m_Scripts.Clear();
                 m_PrimObjects.Clear();
                 m_Assemblies.Clear();
@@ -1428,6 +1438,8 @@ namespace OpenSim.Region.ScriptEngine.XEngine
 
         public void OnShutdown()
         {
+            m_SimulatorShuttingDown = true;
+
             List<IScriptInstance> instances = new List<IScriptInstance>();
 
             lock (m_Scripts)