diff --git a/docs/api-guide/filtering.md b/docs/api-guide/filtering.md
index a710ad7dd..8226aa42d 100644
--- a/docs/api-guide/filtering.md
+++ b/docs/api-guide/filtering.md
@@ -87,7 +87,7 @@ The default filter backends may be set globally, using the `DEFAULT_FILTER_BACKE
         'DEFAULT_FILTER_BACKENDS': ('rest_framework.filters.DjangoFilterBackend',)
     }
 
-You can also set the authentication policy on a per-view, or per-viewset basis,
+You can also set the filter backends on a per-view, or per-viewset basis,
 using the `GenericAPIView` class based views.
 
     class UserListView(generics.ListAPIView):
@@ -216,7 +216,7 @@ For more details, see the [Django documentation][search-django-admin].
 
 ## OrderingFilter
 
-The `OrderingFilter` class supports simple query parameter controlled ordering of results.  To specify the result order, set a query parameter named `'order'` to the required field name.  For example:
+The `OrderingFilter` class supports simple query parameter controlled ordering of results.  To specify the result order, set a query parameter named `'ordering'` to the required field name.  For example:
 
     http://example.com/api/users?ordering=username
 
diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index b5f99823a..5c2ac5280 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -389,11 +389,25 @@ class URLField(CharField):
 
 class SlugField(CharField):
     type_name = 'SlugField'
-
+    form_field_class = forms.SlugField
+    
+    default_error_messages = {
+        'invalid': _("Enter a valid 'slug' consisting of letters, numbers,"
+                     " underscores or hyphens."),
+    }
+    default_validators = [validators.validate_slug]
+    
     def __init__(self, *args, **kwargs):
         super(SlugField, self).__init__(*args, **kwargs)
 
-
+    def __deepcopy__(self, memo):
+        result = copy.copy(self)
+        memo[id(self)] = result
+        #result.widget = copy.deepcopy(self.widget, memo)
+        result.validators = self.validators[:]
+        return result
+    
+  
 class ChoiceField(WritableField):
     type_name = 'ChoiceField'
     form_field_class = forms.ChoiceField
diff --git a/rest_framework/tests/fields.py b/rest_framework/tests/fields.py
index dad69975f..a31042069 100644
--- a/rest_framework/tests/fields.py
+++ b/rest_framework/tests/fields.py
@@ -769,6 +769,21 @@ class SlugFieldTests(TestCase):
         self.assertEqual(serializer.is_valid(), True)
         self.assertEqual(getattr(serializer.fields['slug_field'], 'max_length'), 20)
 
+    def test_invalid_slug(self):
+        """
+        Make sure an invalid slug raises ValidationError
+        """
+        class SlugFieldSerializer(serializers.ModelSerializer):
+            slug_field = serializers.SlugField(source='slug_field', max_length=20, required=True)
+        
+            class Meta:
+                model = self.SlugFieldModel
+                
+        s = SlugFieldSerializer(data={'slug_field': 'a b'})
+        
+        self.assertEqual(s.is_valid(), False)
+        self.assertEqual(s.errors,  {'slug_field': ["Enter a valid 'slug' consisting of letters, numbers, underscores or hyphens."]})
+
 
 class URLFieldTests(TestCase):
     """