diff --git a/OpenSim/Region/CoreModules/Avatar/InstantMessage/InstantMessageModule.cs b/OpenSim/Region/CoreModules/Avatar/InstantMessage/InstantMessageModule.cs
index d2dc1abf65..347708def6 100644
--- a/OpenSim/Region/CoreModules/Avatar/InstantMessage/InstantMessageModule.cs
+++ b/OpenSim/Region/CoreModules/Avatar/InstantMessage/InstantMessageModule.cs
@@ -183,7 +183,8 @@ namespace OpenSim.Region.CoreModules.Avatar.InstantMessage
 
             if (m_TransferModule != null)
             {
-                im.fromAgentName = client.FirstName + " " + client.LastName;
+                if (client != null)
+                    im.fromAgentName = client.FirstName + " " + client.LastName;
                 m_TransferModule.SendInstantMessage(im,
                     delegate(bool success)
                     {
diff --git a/OpenSim/Region/CoreModules/World/Serialiser/SerialiseObjects.cs b/OpenSim/Region/CoreModules/World/Serialiser/SerialiseObjects.cs
index 5067ebd12b..328fbf0275 100644
--- a/OpenSim/Region/CoreModules/World/Serialiser/SerialiseObjects.cs
+++ b/OpenSim/Region/CoreModules/World/Serialiser/SerialiseObjects.cs
@@ -41,7 +41,7 @@ namespace OpenSim.Region.CoreModules.World.Serialiser
 
         public string WriteToFile(Scene scene, string dir)
         {
-            string targetFileName = dir + "objects.xml";
+            string targetFileName = Path.Combine(dir, "objects.xml");
 
             SaveSerialisedToFile(targetFileName, scene);
 
diff --git a/OpenSim/Region/CoreModules/World/Serialiser/SerialiseTerrain.cs b/OpenSim/Region/CoreModules/World/Serialiser/SerialiseTerrain.cs
index 5cbe66bb53..c04753da73 100644
--- a/OpenSim/Region/CoreModules/World/Serialiser/SerialiseTerrain.cs
+++ b/OpenSim/Region/CoreModules/World/Serialiser/SerialiseTerrain.cs
@@ -28,6 +28,7 @@
 using OpenSim.Region.CoreModules.World.Terrain;
 using OpenSim.Region.CoreModules.World.Terrain.FileLoaders;
 using OpenSim.Region.Framework.Scenes;
+using System.IO;
 
 namespace OpenSim.Region.CoreModules.World.Serialiser
 {
@@ -38,7 +39,7 @@ namespace OpenSim.Region.CoreModules.World.Serialiser
         public string WriteToFile(Scene scene, string dir)
         {
             ITerrainLoader fileSystemExporter = new RAW32();
-            string targetFileName = dir + "heightmap.r32";
+            string targetFileName = Path.Combine(dir, "heightmap.r32");
 
             lock (scene.Heightmap)
             {
@@ -50,4 +51,4 @@ namespace OpenSim.Region.CoreModules.World.Serialiser
 
         #endregion
     }
-}
\ No newline at end of file
+}
diff --git a/OpenSim/Region/CoreModules/World/Serialiser/SerialiserModule.cs b/OpenSim/Region/CoreModules/World/Serialiser/SerialiserModule.cs
index 98fe4935bc..04062b0ec2 100644
--- a/OpenSim/Region/CoreModules/World/Serialiser/SerialiserModule.cs
+++ b/OpenSim/Region/CoreModules/World/Serialiser/SerialiserModule.cs
@@ -48,7 +48,7 @@ namespace OpenSim.Region.CoreModules.World.Serialiser
 
         private Commander m_commander = new Commander("export");
         private List<Scene> m_regions = new List<Scene>();
-        private string m_savedir = "exports" + "/";
+        private string m_savedir = "exports";
         private List<IFileSerialiser> m_serialisers = new List<IFileSerialiser>();
 
         #region ISharedRegionModule Members
@@ -192,14 +192,14 @@ namespace OpenSim.Region.CoreModules.World.Serialiser
                 }
             }
 
-            TextWriter regionInfoWriter = new StreamWriter(saveDir + "README.TXT");
+            TextWriter regionInfoWriter = new StreamWriter(Path.Combine(saveDir, "README.TXT"));
             regionInfoWriter.WriteLine("Region Name: " + scene.RegionInfo.RegionName);
             regionInfoWriter.WriteLine("Region ID: " + scene.RegionInfo.RegionID.ToString());
             regionInfoWriter.WriteLine("Backup Time: UTC " + DateTime.UtcNow.ToString());
             regionInfoWriter.WriteLine("Serialise Version: 0.1");
             regionInfoWriter.Close();
 
-            TextWriter manifestWriter = new StreamWriter(saveDir + "region.manifest");
+            TextWriter manifestWriter = new StreamWriter(Path.Combine(saveDir, "region.manifest"));
             foreach (string line in results)
             {
                 manifestWriter.WriteLine(line);
@@ -231,7 +231,7 @@ namespace OpenSim.Region.CoreModules.World.Serialiser
                 if (region.RegionInfo.RegionName == (string) args[0])
                 {
                     // List<string> results = SerialiseRegion(region, m_savedir + region.RegionInfo.RegionID.ToString() + "/");
-                    SerialiseRegion(region, m_savedir + region.RegionInfo.RegionID.ToString() + "/");
+                    SerialiseRegion(region, Path.Combine(m_savedir, region.RegionInfo.RegionID.ToString()));
                 }
             }
         }
@@ -241,7 +241,7 @@ namespace OpenSim.Region.CoreModules.World.Serialiser
             foreach (Scene region in m_regions)
             {
                 // List<string> results = SerialiseRegion(region, m_savedir + region.RegionInfo.RegionID.ToString() + "/");
-                SerialiseRegion(region, m_savedir + region.RegionInfo.RegionID.ToString() + "/");
+                SerialiseRegion(region, Path.Combine(m_savedir, region.RegionInfo.RegionID.ToString()));
             }
         }
 
diff --git a/bin/OpenSimDefaults.ini b/bin/OpenSimDefaults.ini
index 4c579c9f8e..f939cc8d7f 100644
--- a/bin/OpenSimDefaults.ini
+++ b/bin/OpenSimDefaults.ini
@@ -138,7 +138,7 @@
     
     ;; Path to decoded sculpty maps
     ;; Defaults to "j2kDecodeCache
-    ;DecodedSculpMapPath = "j2kDecodeCache"
+    ;DecodedSculptMapPath = "j2kDecodeCache"
 
     ; Choose one of the physics engines below
     ; OpenDynamicsEngine is by some distance the most developed physics engine