Menu router does not load the 'file' before attempting to invoke callbacks, and fails to find/register them during building

This is my work around :

in the same file linkedin.module

<?php
/**
 * Implementation of hook_menu().
 */
function linkedin_menu() {
  $items = array();

  // 1. Establish a requestToken.
  // 2. Direct user to Service Provider.
  $items['linkedin/authenticate'] = array(
    'title' => t('LinkedIn Login'),
    'page callback' => 'linkedin_authentication_page',
    'page arguments' => array(_linkedin_request_token_argument()),
    'access callback' => TRUE,
    'type' => MENU_CALLBACK,
    'file' => 'linkedin.inc',
  );

  return $items;
}

/**
 * Function wrapper that we can remove later if the bug #929506 is resolved.
 * @see http://drupal.org/node/929506
 * 
 * TODO: Remove when the bug is resolved and commited.
 */
function _linkedin_request_token_argument() {
  module_load_include('inc', 'linkedin');
  return _linkedin_request_token();
}
?>

But then the 'file' => 'linkedin.inc' can be removed. And this can be confusing for other developers.

Still the same problem in D7 it seems.