Updated docs

docs/changelog.rst

@@ -2,7 +2,7 @@
 Changelog
 =========
 
-Changes in dev
+Changes in 0.6
 ==============
 
 - No longer always upsert on save for items with a '_id'

docs/guide/defining-documents.rst

@@ -431,6 +431,12 @@ If a dictionary is passed then the following options are available:
 :attr:`unique` (Default: False)
     Whether the index should be sparse.
 
+.. warning::
+
+
+   Inheritance adds extra indices.
+   If don't need inheritance for a document turn inheritance off - see :ref:`document-inheritance`.
+
 
 Geospatial indexes
 ---------------------------
@@ -511,6 +517,8 @@ This ensures that the shard key is sent with the query when calling the
             'shard_key': ('machine', 'timestamp',)
         }
 
+.. _document-inheritance:
+
 Document inheritance
 ====================
 

docs/index.rst

@@ -19,7 +19,7 @@ MongoDB. To install it, simply run
   The complete API documentation.
 
 :doc:`upgrade`
-  The Upgrade guide.
+  How to upgrade MongoEngine.
 
 :doc:`django`
   Using MongoEngine and Django