Thanks Kevin Cozens for a patch that:

Fixes several spelling mistakes

OpenSim/Framework/Servers/HttpServer/OSHttpHandler.cs

@@ -83,7 +83,7 @@ namespace OpenSim.Framework.Servers.HttpServer
         /// <summary>
         /// Regular expression used to match against path of the
         /// incoming HTTP request. If you want to match any string
-        /// either use '.*' or null. To match on the emtpy string use
+        /// either use '.*' or null. To match on the empty string use
         /// '^$'.
         /// </summary>
         public virtual Regex Path

OpenSim/Framework/UndoStack.cs

@@ -90,7 +90,7 @@ namespace OpenSim.Framework
                 return deleted;
             }
             else
-                throw new InvalidOperationException("Cannot pop from emtpy stack");
+                throw new InvalidOperationException("Cannot pop from empty stack");
         }
 
         public T Peek()