diff --git a/OpenSim/Capabilities/Caps.cs b/OpenSim/Capabilities/Caps.cs
index 3efab8e7ec..5e89c388f4 100644
--- a/OpenSim/Capabilities/Caps.cs
+++ b/OpenSim/Capabilities/Caps.cs
@@ -141,6 +141,11 @@ namespace OpenSim.Framework.Capabilities
             m_capsActive.Reset();
         }
 
+        ~Caps()
+        {
+            m_capsActive.Dispose();
+        }
+
         /// <summary>
         /// Register a handler.  This allows modules to register handlers.
         /// </summary>
diff --git a/OpenSim/Framework/DoubleDictionaryThreadAbortSafe.cs b/OpenSim/Framework/DoubleDictionaryThreadAbortSafe.cs
index 9056548a51..4ff8cbabfa 100644
--- a/OpenSim/Framework/DoubleDictionaryThreadAbortSafe.cs
+++ b/OpenSim/Framework/DoubleDictionaryThreadAbortSafe.cs
@@ -55,6 +55,11 @@ namespace OpenSim.Framework
             Dictionary2 = new Dictionary<TKey2, TValue>(capacity);
         }
 
+        ~DoubleDictionaryThreadAbortSafe()
+        {
+            rwLock.Dispose();
+        }
+
         public void Add(TKey1 key1, TKey2 key2, TValue value)
         {
             bool gotLock = false;
diff --git a/OpenSim/Region/PhysicsModules/ubOdeMeshing/Meshmerizer.cs b/OpenSim/Region/PhysicsModules/ubOdeMeshing/Meshmerizer.cs
index 98c2e71caf..2ae0881e78 100644
--- a/OpenSim/Region/PhysicsModules/ubOdeMeshing/Meshmerizer.cs
+++ b/OpenSim/Region/PhysicsModules/ubOdeMeshing/Meshmerizer.cs
@@ -1483,6 +1483,7 @@ namespace OpenSim.Region.PhysicsModule.ubODEMeshing
 
             lock (diskLock)
             {
+                Stream stream = null;
                 try
                 {
                     if (!Directory.Exists(dir))
@@ -1490,8 +1491,8 @@ namespace OpenSim.Region.PhysicsModule.ubODEMeshing
                         Directory.CreateDirectory(dir);
                     }
 
-                    using(Stream stream = File.Open(filename, FileMode.Create))
-                        ok = mesh.ToStream(stream);
+                    stream = File.Open(filename, FileMode.Create);
+                    ok = mesh.ToStream(stream);
                 }
                 catch (IOException e)
                 {
@@ -1500,6 +1501,11 @@ namespace OpenSim.Region.PhysicsModule.ubODEMeshing
                         filename, e.Message, e.StackTrace);
                     ok = false;
                 }
+                finally
+                {
+                    if(stream != null)
+                        stream.Dispose();
+                }
 
                 if (!ok && File.Exists(filename))
                 {
diff --git a/ThirdParty/SmartThreadPool/WorkItemsQueue.cs b/ThirdParty/SmartThreadPool/WorkItemsQueue.cs
index e0bc9168ec..019c0d34b2 100644
--- a/ThirdParty/SmartThreadPool/WorkItemsQueue.cs
+++ b/ThirdParty/SmartThreadPool/WorkItemsQueue.cs
@@ -625,6 +625,7 @@ namespace Amib.Threading.Internal
             if (!_isDisposed)
             {
                 Cleanup();
+		        _headWaiterEntry.Close();
             }
             _isDisposed = true;
         }