Index: django/db/backends/postgresql_psycopg2/base.py
===================================================================
--- django/db/backends/postgresql_psycopg2/base.py	(revision 4463)
+++ django/db/backends/postgresql_psycopg2/base.py	(working copy)
@@ -42,7 +42,7 @@
             if settings.DATABASE_PORT:
                 conn_string += " port=%s" % settings.DATABASE_PORT
             self.connection = Database.connect(conn_string, **self.options)
-            self.connection.set_isolation_level(1) # make transactions transparent to all cursors
+            self.connection.set_isolation_level(0) # autocommit
         cursor = self.connection.cursor()
         cursor.tzinfo_factory = None
         cursor.execute("SET TIME ZONE %s", [settings.TIME_ZONE])