You can't make this up...

wtf.php

// Instead of a simple call to JHtml::_('behavior.framework') I have to deal with this...

if (JVERSION >= '1.6.0') {
  $file   = JUri::root() . '/media/system/js/core.js';
  $loaded = false;

  foreach ($document->_scripts as $key => $value) {
    if ($key == $file) {
      $loaded = true;
    }

    if (!$loaded) {
      $document->addScript($file);
    }
  }
}