Notice: Undefined property: stdClass::$nid in premium_node_level_data() (line 319)

Looks good to me.

This patch needs some work. While it correctly causes the error message to disappear it breaks the default premium type selection for the new node.

It also hides the fact that there is a bug in the way that the value for the premium select box is being selected.

The following code seems to fix both of these problems:

function premium_form_alter(&$form, $form_state, $form_id) {
  if (isset($form['type']['#value']) && $form['type']['#value'] . '_node_form' == $form_id) {
    if (user_access('administer node premium status')) {
      $node = $form['#node'];
      if (isset($node->nid)) {
        $premium_level = premium_node_level($node);
      } else {
        $premium_level = premium_node_level($node->type);
      }
      
      $form['options']['premium'] = array(
        '#type' => 'select',
        '#title' => t('Premium content level'),
        '#default_value' => $premium_level,
        '#options' => array(0 => t('None')) + premium_level_option_list(),
      );
    }
  }
}

This is still a issue, or am I wrong?
I ask this because I get the same notice when I'm creating a node.

Since the latest version of the module still has this issue, here is a patch which fixed the error on my projects

Trimmed irrelevant changes