Limited number of CSS includes?

Thank you so much for this module.

I'm having a strange problem when I include more than 21 custom settings.

I have 33 custom settings in my new theme. They all work in FF. However in IE (including both IE6 and IE7) they all work ONLY if I remove 12 of the CSS include lines in my template.php. Any combination of them, up to 21 and everything works fine. Any more than 21 and the CSS includes still work, BUT any CSS inserted inline in the page.tpl.php header stops working in IE. This same inline CSS DOES continue to work in FF.

Here is an example of the CSS Include lines I am referring to in template.php:

drupal_add_css(drupal_get_path('theme', 'denver') . '/css/' . $centerbg . '.css', 'theme');

BELOW IS ALL THE CODE:

Here is the code I'm using in theme-settings.php:

    'denver_centerbg' => '',
	'denver_customcenterbg' => '',

  $settings = array_merge($defaults, $settings);
  $form['denver_centerbg'] = array(
    '#type' => 'select',
    '#title' => t('Center Column Background'),
    '#default_value' => $settings['denver_centerbg'],
    '#options' => array(
      'centerbg-trans' => t('Transparent (default)'),
      'centerbg-white' => t('White'),
      'centerbg-lightgray' => t('Light Gray'),
      'centerbg-gray' => t('Gray'),
      'centerbg-black' => t('Black'),
      'centerbg-custom' => t('Custom Center Column Background'),
    ),
  );

  $form['denver_customcenterbg'] = array(
    '#type' => 'textfield',
    '#title' => t('Custom Center Column Background'),
    '#default_value' => $settings['denver_customcenterbg'],
    '#size' => 40,
    '#maxlength' => 100,
  );

Here is the code I'm using in template.php:

'denver_centerbg' => 'centerbg-trans',
'denver_customcenterbg' => '',

$centerbg = theme_get_setting('denver_centerbg');
if (!$centerbg)
{
   $centerbg = '';
}

drupal_add_css(drupal_get_path('theme', 'denver') . '/css/' . $centerbg . '.css', 'theme');

Here is the code I'm using in page.tpl.php:

<?php 
$centerbg = theme_get_setting('denver_centerbg');
if (!$centerbg)
{
   $centerbg = '';
}
 ?>

   <?php if ($centerbg=='centerbg-custom'):?>
      	#center {background : <?php print theme_get_setting('denver_customcenterbg') ?>;}
   <?php endif; ?>