Ошибка! ]:->

<?php
require_once('funct.php');
require_once('navigator.php');
echo up('СверхБлог');
switch($_GET['act']) {
default:

$navig = new navigation();

$blog = mysql_result(mysql_query("SELECT COUNT(*) FROM blog"), 0);

if(!$blog)
{
echo '<div class="menu">Статей пока нет.</div>';
}
else
{
$sql = mysql_query("SELECT * FROM blog ORDER BY id DESC '.$navig->limit());

while($res = mysql_fetch_assoc($sql))
{
echo '<div class="menu">'.$res['title'].' ('.date('d.m.y/H:i', $res['time']).')<br />';
echo mb_substr($res['msg'], 0, 50, 'UTF-8');
echo '...| <a href="index.php?act=view;file='.$res['id'].'">Читать всё &#187;</a><br /></div>';
}
$navig->view();
}
break;

case 'view':
$file = (int)$_GET['file'];

$res = mysql_fetch_assoc(mysql_query("SELECT * FROM blog WHERE id='.$file.'"));

echo '<div class="menu">';
echo 'Заголовок: '.$res['title'];
echo 'Текст: '.$res['msg'];
echo 'Дата добавления: '.date('d.m.y/H:i', $res['time']).'</div>';
}
echo down($copy);
?>

<?php
$sql = mysql_query('SELECT * FROM blog ORDER BY id DESC '.$navig->limit()); 

dont give me names (22 Сентября 2010 / 20:32)
$sql = mysql_query("SELECT * FROM blog ORDER BY id DESC '.$navig->limit());
кавычку одинарную на двойную замени