2 files changed, 8 insertions, 4 deletions
diff --git a/django/utils/_os.py b/django/utils/_os.py
index ad4efb3264..884689fefc 100644
--- a/django/utils/_os.py
+++ b/django/utils/_os.py
@@ -61,7 +61,7 @@ def rmtree_errorhandler(func, path, exc_info):
     continue without problems.
     """
     exctype, value = exc_info[:2]
-    # lookin for a windows error
+    # looking for a windows error
     if exctype is not WindowsError or 'Access is denied' not in str(value):
         raise
     # file type should currently be read only
diff --git a/django/utils/datastructures.py b/django/utils/datastructures.py
index 09d37518e0..f7042f7061 100644
--- a/django/utils/datastructures.py
+++ b/django/utils/datastructures.py
@@ -128,6 +128,12 @@ class SortedDict(dict):
         return self.__class__([(key, copy.deepcopy(value, memo))
                                for key, value in self.iteritems()])
 
+    def __copy__(self):
+        # The Python's default copy implementation will alter the state
+        # of self. The reason for this seems complex but is likely related to
+        # subclassing dict.
+        return self.copy()
+
     def __setitem__(self, key, value):
         if key not in self:
             self.keyOrder.append(key)
@@ -200,9 +206,7 @@ class SortedDict(dict):
     def copy(self):
         """Returns a copy of this object."""
         # This way of initializing the copy means it works for subclasses, too.
-        obj = self.__class__(self)
-        obj.keyOrder = self.keyOrder[:]
-        return obj
+        return self.__class__(self)
 
     def __repr__(self):
         """