thank you for the reply.

the html_header.php location is /www/zen_151testing/includes/templates/custom_temp/common/html_header.php

and yes after i looked it, it is custom indeed but it have all template specific css and java scripts links rest is as-is like default file except following 2 codes are missing, rest nothing unusual atleast for me. and there are no secondary html_header.php within the custom template folders.

even if I added below given 2 missing codes, still same issue.

Code:
/**
 *  custom category handling for a parent and all its children ... works for any c_XX_XX_children.css  where XX_XX is any parent category
 */
  $tmp_cats = explode('_', $cPath);
  $value = '';
  foreach($tmp_cats as $val) {
    $value .= $val;
    $perpagefile = $template->get_template_dir('.css', DIR_WS_TEMPLATE, $current_page_base, 'css') . '/c_' . $value . '_children.css';
    if (file_exists($perpagefile)) echo '<link rel="stylesheet" type="text/css" href="' . $perpagefile .'" />'."\n";
    $perpagefile = $template->get_template_dir('.css', DIR_WS_TEMPLATE, $current_page_base, 'css') . '/' . $_SESSION['language'] . '_c_' . $value . '_children.css';
    if (file_exists($perpagefile)) echo '<link rel="stylesheet" type="text/css" href="' . $perpagefile .'" />'."\n";
    $value .= '_';
 }
in the end </head> was missing
Code:
</head>
<?php // NOTE: Blank line following is intended: ?>
link of stated template.css is like this follows, if you are interested in that
Code:
<link rel="stylesheet" href="<?php  echo $template->get_template_dir('',DIR_WS_TEMPLATE, $current_page_base,'css').'/template.css'?>" type="text/css" />
in html_header.php

when i commented out the template.css in html_header.php, it is effecting main page menu outlook so I restored it for now, I havent checked what all other it is effecting.

any other code or file location you need, then i'll provide that. i dont know what you are exactly looking for so given what I could make out of your answer.

with regards,

~Time