Dear module developers, Please test your modules on Drupal 5.2-dev. It has a duplicate form submission filter <http://drupal.org/node/107358#comment-204814> that may cause subtle issues with your modules' form submissions. This happens when the proper operation of your module requires or should support subsequent submissions that have the same $_POST data. The remedy is to set #skip_duplicate_check for your form, or the form that your module alters. Regards, Heine Deelstra