Certain fields doesn't work - node reference, file attachements etc. Missing variable?

Hi.

I installed this module and everything works with the default template:

<div class="node-form">
  <div class="standard">
    <?php print $standard; ?>
  </div>
  <?php print $admin; ?>
  <?php print $buttons; ?>
</div>

But when I swap it with my custom template (css and markup removed):

<div class="node-form">
    <div class="standard">
        <?php print $form_ids; ?>
        <?php print $title; ?>
        <?php print $field_prosjekttekst; ?>
        <?php print $taxonomy; ?>
        <?php print $menu; ?>
        <?php print $field_kontaktinfo; ?>
        <?php print $field_kontaktpersoner; ?>
        <?php print $nodesubscribe; ?>
        <?php print $node_notify_time; ?>
        <?php print $notifications_content; ?>
        <?php print $attachments; ?>
        <?php print $book; ?>
        <?php print $print; ?>
        <?php print $revision_information; ?>
        <?php print $path; ?>
        <?php print $comment_settings; ?>
        <?php print $scheduler_settings; ?>
        <?php print $admin; ?>
    </div>
    <?php print $buttons; ?>
</div>

Certain fields, AJAX / AHAH seems to be the common denominator, doesn't work. All the fields show up and everything looks identical, but when I try to add a node with the node_reference field I get an error:

An HTTP error 0 occurred. 
/fas/content/js_add_more/prosjekt/field_kontaktpersoner

When I try to select my catagory using the hierarchical select module field I get another error:

Received an invalid response from the server.

Seeing as everything works with the default template I'm certain this isn't the modules fault, but rather me not printing the correct variables. I'm just not sure what I'm missing. :)

Btw, this is one of the most awesome modules I've used for Drupal. It should be part of core. Theming forms should have been this easy all along.

Cheers,
TwiiK