In my application which is hosted on GAE I have backup/restore functions which use export_to_csv_file/import_from_csv_file.
While this is not a practical backup/restore for GAE (restore would take far too long and timeout, so for this purpose I use GAE bulk loader tool), I have used it in the past to backup from GAE and restore to test environment. This used to work fine. However, with 1.99.2, reference fields in all the tables are left with the GAE values rather than being replaced with the new ID's of the corresponding records. Both export and import were done by 1.99.2 and the import otherwise works - there is no reported failure. Is this related to issues 351 or 513 in code.google.com/p/web2py?