--- a/server/__init__.py	Thu Aug 28 18:54:21 2014 +0200
+++ b/server/__init__.py	Tue Nov 04 14:10:02 2014 +0100
@@ -329,6 +329,7 @@
         mhandler.cmd_exec_event_script('pre%s' % event, apphome=True)
         # enter instance'schema into the database
         serialize_schema(cnx, schema)
+        cnx.commit()
         # execute cubicweb's post<event> script
         mhandler.cmd_exec_event_script('post%s' % event)
         # execute cubes'post<event> script if any