Please use '$front_page' instead of $base_path in page.tpl.php

Please use $front_page instead of $base_path when linking to the front page of a site, because $front_page will include the language domain and prefix when applicable.
For example, in page.tpl.php,

  <div id="header"><!-- begin header -->
    <?php if ($logo): ?><div id="logo"><a href="<?php check_url($front_page)  ?>" title="<?php print $site_name ?>"><img src="<?php print $logo ?>" alt="<?php print $site_name ?>" /></a></div><?php endif; ?>
    <div id="slogan-floater"><!-- begin slogan-floater -->
      <?php if ($site_name): ?><h1 class='site-name'><a href="<?php print check_url($front_page)  ?>" title="<?php print $site_name ?>"><?php print $site_name ?></a></h1><?php endif; ?>