New version of FileField module

That's odd ... can you add this function to patchmanager.module and see if it solves the problem?

/**
* Implementation of hook_content_is_empty().
*/
patch_manager_content_is_empty($item, $field) {
if (empty($item['value']) && (string)$item['value'] !== '0') {
return TRUE;
}
return FALSE;
}