diff --git a/OpenSim/Framework/AvatarAppearance.cs b/OpenSim/Framework/AvatarAppearance.cs
index 0b0afeb9bf..cce44b02b8 100644
--- a/OpenSim/Framework/AvatarAppearance.cs
+++ b/OpenSim/Framework/AvatarAppearance.cs
@@ -414,12 +414,16 @@ namespace OpenSim.Framework
 
         internal void ReplaceAttachment(AvatarAttachment attach)
         {
+//            m_log.DebugFormat(
+//                "[AVATAR APPEARANCE]: Replacing itemID={0}, assetID={1} at {2}",
+//                attach.ItemID, attach.AssetID, attach.AttachPoint);
+
             m_attachments[attach.AttachPoint] = new List<AvatarAttachment>();
             m_attachments[attach.AttachPoint].Add(attach);
         }
 
         /// <summary>
-        /// Add an attachment
+        /// Set an attachment
         /// </summary>
         /// <remarks>
         /// If the attachpoint has the
@@ -449,11 +453,20 @@ namespace OpenSim.Framework
                     m_attachments.Remove(attachpoint);
                     return true;
                 }
+                
                 return false;
             }
 
-            // check if the item is already attached at this point
-            if (GetAttachpoint(item) == (attachpoint & 0x7F))
+            // When a user logs in, the attachment item ids are pulled from persistence in the Avatars table.  However,
+            // the asset ids are not saved.  When the avatar enters a simulator the attachments are set again.  If
+            // we simply perform an item check here then the asset ids (which are now present) are never set, and NPC attachments
+            // later fail unless the attachment is detached and reattached.
+            //
+            // Therefore, we will carry on with the set if the existing attachment has no asset id.
+            AvatarAttachment existingAttachment = GetAttachmentForItem(item);
+            if (existingAttachment != null
+                && existingAttachment.AssetID != UUID.Zero
+                && existingAttachment.AttachPoint == (attachpoint & 0x7F))
             {
                 // m_log.DebugFormat("[AVATAR APPEARANCE] attempt to attach an already attached item {0}",item);
                 return false;
@@ -474,6 +487,23 @@ namespace OpenSim.Framework
             return true;
         }
 
+        /// <summary>
+        /// If the item is already attached, return it.
+        /// </summary>
+        /// <param name="itemID"></param>
+        /// <returns>Returns null if this item is not attached.</returns>
+        public AvatarAttachment GetAttachmentForItem(UUID itemID)
+        {
+            foreach (KeyValuePair<int, List<AvatarAttachment>> kvp in m_attachments)
+            {
+                int index = kvp.Value.FindIndex(delegate(AvatarAttachment a) { return a.ItemID == itemID; });
+                if (index >= 0)
+                    return kvp.Value[index];
+            }
+
+            return null;
+        }
+
         public int GetAttachpoint(UUID itemID)
         {
             foreach (KeyValuePair<int, List<AvatarAttachment>> kvp in m_attachments)
diff --git a/OpenSim/Framework/ChildAgentDataUpdate.cs b/OpenSim/Framework/ChildAgentDataUpdate.cs
index 613db1c55a..53ec166b4e 100644
--- a/OpenSim/Framework/ChildAgentDataUpdate.cs
+++ b/OpenSim/Framework/ChildAgentDataUpdate.cs
@@ -628,6 +628,7 @@ namespace OpenSim.Framework
                         // We know all of these must end up as attachments so we
                         // append rather than replace to ensure multiple attachments
                         // per point continues to work
+//                        m_log.DebugFormat("[CHILDAGENTDATAUPDATE]: Appending attachments for {0}", AgentID);
                         Appearance.AppendAttachment(new AvatarAttachment((OSDMap)o));
                     }
                 }
diff --git a/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs b/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
index 3f8c01fc1c..0fa2e00e2b 100644
--- a/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
+++ b/OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
@@ -247,6 +247,14 @@ namespace OpenSim.Region.CoreModules.Avatar.Attachments.Tests
             Assert.That(attSo.IsAttachment);
             Assert.That(attSo.UsesPhysics, Is.False);
             Assert.That(attSo.IsTemporary, Is.False);
+
+            // Check appearance status
+            List<AvatarAttachment> retreivedAttachments = presence.Appearance.GetAttachments();
+            Assert.That(retreivedAttachments.Count, Is.EqualTo(1));
+            Assert.That(retreivedAttachments[0].AttachPoint, Is.EqualTo((int)AttachmentPoint.Chest));
+            Assert.That(retreivedAttachments[0].ItemID, Is.EqualTo(attItemId));
+            Assert.That(retreivedAttachments[0].AssetID, Is.EqualTo(attAssetId));
+            Assert.That(presence.Appearance.GetAttachpoint(attItemId), Is.EqualTo((int)AttachmentPoint.Chest));
         }
 
         // I'm commenting this test because scene setup NEEDS InventoryService to 
diff --git a/OpenSim/Services/Interfaces/IAvatarService.cs b/OpenSim/Services/Interfaces/IAvatarService.cs
index 0d5ab7db2e..cda7113a4f 100644
--- a/OpenSim/Services/Interfaces/IAvatarService.cs
+++ b/OpenSim/Services/Interfaces/IAvatarService.cs
@@ -262,7 +262,6 @@ namespace OpenSim.Services.Interfaces
                             UUID.Parse(Data["SkirtItem"]),
                             UUID.Parse(Data["SkirtAsset"]));
 
-
                 if (Data.ContainsKey("VisualParams"))
                 {
                     string[] vps = Data["VisualParams"].Split(new char[] {','});
@@ -291,7 +290,6 @@ namespace OpenSim.Services.Interfaces
                     }
                 }
 
-
                 // Attachments
                 Dictionary<string, string> attchs = new Dictionary<string, string>();
                 foreach (KeyValuePair<string, string> _kvp in Data)
@@ -308,7 +306,7 @@ namespace OpenSim.Services.Interfaces
                     UUID uuid = UUID.Zero;
                     UUID.TryParse(_kvp.Value, out uuid);
 
-                    appearance.SetAttachment(point,uuid,UUID.Zero);
+                    appearance.SetAttachment(point, uuid, UUID.Zero);
                 }
 
                 if (appearance.Wearables[AvatarWearable.BODY].Count == 0)