Node Clone hates Node Expire?

Well, the short answer is that this is a very simple module that treats all fields equally (except for some configurable bis with the publishing options), so if you want specific functionality like this the easiest thing would be to make your own version of the module.

take a look at the code:

http://cvs.drupal.org/viewvc.py/drupal/contributions/modules/node_clone/...

this is the one function that actually does the work:

/**
 *  Clones a node - prepopulate a node editing form
 */
function clone_node($nid)
{
  if (is_numeric($nid)) {
    global $user;
    
    $node = node_load($nid);
    if (isset($node->nid)) {
      
      $node->nid = NULL;
      $node->uid = $user->uid;
      $node->created = NULL;   
      $node->menu = NULL;
      $node->path = NULL;
      $node->files = array();
      $node->title = t('Clone of @title', array('@title' => $node->title));
      drupal_set_title(check_plain($node->title));
      
      if (variable_get('clone_reset_'. $node->type, FALSE)) {
        $node_options = variable_get('node_options_'. $node->type, array('status', 'promote'));
        // fill in the default values
        foreach (array('status', 'moderate', 'promote', 'sticky', 'revision') as $key) {
          $node->$key = in_array($key, $node_options);
        } 
      }
      if (empty($_POST['op'])) {
        drupal_set_message('This clone will not be saved to the database until you submit.');
      }
      return  drupal_get_form($node->type .'_node_form', $node); 
    }
  }
}

see how $node->menu, etc are treated (set to NULL or unset). You'll want to do this for any/all of the node expire fields.

see also: http://drupal.org/node/199895