diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index fe051e6299..0f7d03992f 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -4277,8 +4277,8 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             m_host.AddScriptLPS(1);
 
             double angle = Math.Acos(a.x * b.x + a.y * b.y + a.z * b.z + a.s * b.s) * 2;
-            //if (angle < 0) angle = -angle;
-            //if (angle > Math.PI) return (Math.PI * 2 - angle);
+            if (angle < 0) angle = -angle;
+            if (angle > Math.PI) return (Math.PI * 2 - angle);
             return angle; 
         }
 
diff --git a/OpenSim/Region/ScriptEngine/Shared/Tests/LSL_ApiTest.cs b/OpenSim/Region/ScriptEngine/Shared/Tests/LSL_ApiTest.cs
index 336cc12212..cde772baf4 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Tests/LSL_ApiTest.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Tests/LSL_ApiTest.cs
@@ -45,7 +45,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Tests
     public class LSL_ApiTest
     {
 
-        private const double ANGLE_ACCURACY_IN_RADIANS = 1E-7;
+        private const double ANGLE_ACCURACY_IN_RADIANS = 1E-6;
         private LSL_Api lslApi;
 
         [SetUp]
@@ -73,22 +73,18 @@ namespace OpenSim.Region.ScriptEngine.Shared.Tests
             TestllAngleBetween(new Vector3(1, 0, 0), 0);
             TestllAngleBetween(new Vector3(1, 0, 0), 90);
             TestllAngleBetween(new Vector3(1, 0, 0), 180);
-            //TestllAngleBetween(new Vector3(1, 0, 0), 270); // angles cant be larger than 180
 
             TestllAngleBetween(new Vector3(0, 1, 0), 0);
             TestllAngleBetween(new Vector3(0, 1, 0), 90);
             TestllAngleBetween(new Vector3(0, 1, 0), 180);
-            //TestllAngleBetween(new Vector3(0, 1, 0), 270);
 
             TestllAngleBetween(new Vector3(0, 0, 1), 0);
             TestllAngleBetween(new Vector3(0, 0, 1), 90);
             TestllAngleBetween(new Vector3(0, 0, 1), 180);
-            //TestllAngleBetween(new Vector3(0, 0, 1), 270);
 
             TestllAngleBetween(new Vector3(1, 1, 1), 0);
             TestllAngleBetween(new Vector3(1, 1, 1), 90);
             TestllAngleBetween(new Vector3(1, 1, 1), 180);
-            //TestllAngleBetween(new Vector3(1, 1, 1), 270);
         }
 
         private void TestllAngleBetween(Vector3 axis,float originalAngle)