Validation logic is only working on saved nodes

The bit of code that checks to see if the pathauto path that is created during validation is a dupe(-# is added) only works if pathauto has set the $node->path variable which doesn't happen in validation. So this will cause the creation to validate but disallow a node update.

This only happens if you do not assign a domain specific value.

I am not sure if we should be checking this here, maybe just a notice? The path that would be assigned to the node is handled by pathauto already and just added a (-#).

  if ($count) {
    // If there are no aliases for the active domains, we have to ensure
    // that this is not a duplicate alias.
    $domains = array_filter($node->domains);
    $set_paths = array_filter($paths);
    if (empty($domains)) {
      form_set_error('domain_path', t('The path alias is already in use. You may provide a domain-specific alias below.'));
      $set_message = TRUE;
    }
    elseif (empty($set_paths)) {
      foreach ($domains as $domain_id) {
        $key = ($domain_id == -1) ? 0 : $domain_id;
        form_set_error("domain_path][$key", t('The path alias %alias is already in use. You should provide a domain-specific alias.', array('%alias' => $alias)));
        $set_message = TRUE;
      }
    }
  }