--- a/misc/migration/3.13.8_Any.py	Fri Oct 07 15:55:14 2011 +0200
+++ b/misc/migration/3.13.8_Any.py	Fri Oct 07 15:55:15 2011 +0200
@@ -1,2 +1,5 @@
+change_attribute_type('CWCache', 'timestamp', 'TZDatetime')
+change_attribute_type('CWUser', 'last_login_time', 'TZDatetime')
+change_attribute_type('CWSource', 'latest_retrieval', 'TZDatetime')
 drop_attribute('CWSource', 'synchronizing')
 add_attribute('CWSource', 'in_synchronization')