Error on new release, packaging error

After trying to create a new release on a project I get an error, see here: http://drupal.org/node/390284. The release is unpublished, probably because of this.

I know that the error is not always visible, so here it is:

Packaging error messages

    * node_load(390284) failed: O:8:"stdClass":3:{s:4:"name";s:7:"snufkin";s:7:"picture";s:0:"";s:4:"data";s:281:"a:8:{s:6:"submit";s:18:"Create new account";s:7:"form_id";s:13:"user_register";s:7:"contact";i:1;s:5:"block";a:2:{s:5:"block";a:1:{i:1;i:1;}s:4:"menu";a:2:{i:692;i:0;i:700;i:1;}}s:5:"sn_42";i:0;s:5:"sn_44";i:1;s:8:"sn_email";s:18:"flamor@freemail.hu";s:9:"sn_update";s:6:"Update";}";}