IE geeft rare DB-waarde

<tr>
  <td colspan="2">
    <form action="comment.php" method="post">
      naam: <input type="text" name="naam" /><br />
      e-mail: <input type="text" name="email" /><br />
      website: <input type="text" name="site" value="http://"><br />
      reactie:<br/>
      <textarea cols="50" rows="5" name="comment"></textarea>
      <input type="hidden" name="blog" value="
<?php
print $blog;
?>
">
      <input type="submit" value="Plaats commentaar" />
    </form>
  </td>
</tr>

<tr>
  <td colspan="2">
    <form action="comment.php" method="post">
      naam: <input type="text" name="naam" /><br />
      e-mail: <input type="text" name="email" /><br />
      website: <input type="text" name="site" value="http://"><br />
      reactie:<br/>
      <textarea cols="50" rows="5" name="comment"></textarea>
      <input type="hidden" name="blog" value="
<?php
print $blog;
?>
">
      <input type="submit" value="Plaats commentaar" />
    </form>
  </td>
</tr>

<?php
include("connect.php");
$name=$_POST['naam'];
$email=$_POST['email'];
$comment=strip_tags($_POST['comment']);
$ip=$_SERVER['REMOTE_ADDR'];
$date=date("Y-m-d H:i:s", time());
$blog=$_POST['blog'];
$url=$_POST['site'];

mysql_query("INSERT INTO $commenttable (name, email, comment, date, ip, blog, url) VALUES ('$name', '$email', '$comment', '$date', '$ip', '$blog', '$url')") or die(mysql_error());
header("Location: blog.php?blog=".$blog);
?>

<?php
include("connect.php");
$name=$_POST['naam'];
$email=$_POST['email'];
$comment=strip_tags($_POST['comment']);
$ip=$_SERVER['REMOTE_ADDR'];
$date=date("Y-m-d H:i:s", time());
$blog=$_POST['blog'];
$url=$_POST['site'];
 
mysql_query("INSERT INTO $commenttable (name, email, comment, date, ip, blog, url) VALUES ('$name', '$email', '$comment', '$date', '$ip', '$blog', '$url')") or die(mysql_error());
header("Location: blog.php?blog=".$blog);
?>