diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/MOD_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/MOD_Api.cs
index 4bd3dffd30..7844c75155 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/MOD_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/MOD_Api.cs
@@ -200,24 +200,34 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             for (int i = 0; i < result.Length; i++)
             {
                 if (result[i] is string)
+                {
                     llist[i] = new LSL_String((string)result[i]);
+                }
                 else if (result[i] is int)
+                {
                     llist[i] = new LSL_Integer((int)result[i]);
+                }
                 else if (result[i] is float)
+                {
                     llist[i] = new LSL_Float((float)result[i]);
+                }
+                else if (result[i] is UUID)
+                {
+                    llist[i] = new LSL_Key(result[i].ToString());
+                }
                 else if (result[i] is OpenMetaverse.Vector3)
                 {
                     OpenMetaverse.Vector3 vresult = (OpenMetaverse.Vector3)result[i];
-                    llist[i] = new LSL_Vector(vresult.X,vresult.Y,vresult.Z);
+                    llist[i] = new LSL_Vector(vresult.X, vresult.Y, vresult.Z);
                 }
                 else if (result[i] is OpenMetaverse.Quaternion)
                 {
                     OpenMetaverse.Quaternion qresult = (OpenMetaverse.Quaternion)result[i];
-                    llist[i] = new LSL_Rotation(qresult.X,qresult.Y,qresult.Z,qresult.W);
+                    llist[i] = new LSL_Rotation(qresult.X, qresult.Y, qresult.Z, qresult.W);
                 }
                 else
                 {
-                    MODError(String.Format("unknown list element returned by {0}",fname));
+                    MODError(String.Format("unknown list element {1} returned by {0}", fname, result[i].GetType().Name));
                 }
             }
 
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
index 413739776f..e0b4db62dc 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
@@ -3274,5 +3274,19 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             InitLSL();
             ((LSL_Api)m_LSL_Api).DetachFromAvatar();
         }
+
+        /// <summary>
+        /// Checks if thing is a UUID.
+        /// </summary>
+        /// <param name="thing"></param>
+        /// <returns>1 if thing is a valid UUID, 0 otherwise</returns>
+        public LSL_Integer osIsUUID(string thing)
+        {
+            CheckThreatLevel(ThreatLevel.None, "osIsUUID");
+            m_host.AddScriptLPS(1);
+
+            UUID test;
+            return UUID.TryParse(thing, out test) ? 1 : 0;
+        }
     }
 }
\ No newline at end of file
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs
index b5416c8b0e..c9403ebc29 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs
@@ -276,5 +276,12 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Interfaces
 
         void osSetTerrainTexture(int level, LSL_Key texture);
         void osSetTerrainTextureHeight(int corner, double low, double high);
+
+        /// <summary>
+        /// Checks if thing is a UUID.
+        /// </summary>
+        /// <param name="thing"></param>
+        /// <returns>1 if thing is a valid UUID, 0 otherwise</returns>
+        LSL_Integer osIsUUID(string thing);
     }
 }
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs
index b40bdf0b17..99995a7171 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs
@@ -930,5 +930,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.ScriptBase
         {
             m_OSSL_Functions.osSetTerrainTextureHeight(corner, low, high);
         }
+
+        public LSL_Integer osIsUUID(string thing)
+        {
+            return m_OSSL_Functions.osIsUUID(thing);
+        }
     }
 }