IE6/IE7 CSSs doesn't load in a non root Drupal installation

In page.tpl.php:

<!--[if lte IE 6]>
<?php if (theme_get_setting('menutype')== '1') { ?>
<script type="text/javascript" src="/<?php print $directory; ?>/js/suckerfish.js"></script>
<?php } ?>
<link type="text/css" rel="stylesheet" media="all" href="/<?php print $directory; ?>/css/ie6.css" />
<![endif]-->
<!--[if IE 7]>
<link type="text/css" rel="stylesheet" media="all" href="/<?php print $directory; ?>/css/ie7.css" />
<![endif]-->

should be:

<!--[if lte IE 6]>
<?php if (theme_get_setting('menutype')== '1') { ?>
<script type="text/javascript" src="<?php print $base_path . $directory; ?>/js/suckerfish.js"></script>
<?php } ?>
<link type="text/css" rel="stylesheet" media="all" href="<?php print $base_path . $directory; ?>/css/ie6.css" />
<![endif]-->
<!--[if IE 7]>
<link type="text/css" rel="stylesheet" media="all" href="<?php print $base_path . $directory; ?>/css/ie7.css" />
<![endif]-->

to work with Drupal installed, for example in "/drupal/" subdirectory.

The same issue applies to maintenance-page.tpl.php.