IE6 Form Bug?

On this page: http://www.chrisvschris.com/wp/spelling-not-so-important

I have this code and this form works fine in FF or IE7 but not IE6.. can anybody tell me the issue? I can't click on the first form box.
<h3>Leave a comment</h3>
<p class="headertext">Comments can contain some xhtml. Names and emails are required (emails aren't displayed), url's are optional.</p>
<form id="commentform" action="<?php echo get_option('siteurl'); ?>/wp-comments-post.php" method="post">
<br />
<!--<php smilies_clickable() ?>-->
<br />
      <div>
      <textarea name="comment" id="comment" cols="120" rows="6" tabindex="1"></textarea>
      <input type="hidden" name="comment_post_ID" value="<?php echo $post->ID; ?>" />
      <input type="hidden" name="redirect_to" value="<?php echo htmlspecialchars($_SERVER['REQUEST_URI']); ?>" />
      </div>

<?php if(!$user_ID) : ?>

      <div id="inputcontainer">
      <div id="namefield">
        <input type="text" name="author" id="author" class="textarea" value="" size="15" tabindex="2" /><br />
        <label for="author">Name</label>
      </div>
      <div id="emailfield">
        <input type="text" name="email" id="email" value="" size="15" tabindex="3" /><br />
        <label for="email">E-mail</label>
      </div>
      <div id="urlfield">
        <input type="text" name="url" id="url" value="" size="15" tabindex="4" /><br />
         <label for="url"><acronym title="Uniform Resource Identifier">URI</acronym></label>
      </div>
      </div>

<?php else : ?>

        <p>
          You are logged in as <?php echo($user_identity); ?>.
        </p>

<?php endif; ?>

      <p id="submitter">
        <input name="submit" id="submit" type="submit" value="I'm done, post it." />
      </p>

      <?php do_action('comment_form', $post->ID); ?>
      
</form>