Where is file located?

Its it a custom defined fiction in themes ? Look at ddrsg

Which function outputs add_to_head() then?

thats in output_handling_include.php

Sorry Archer, what I mean is which functions outputs the header tags.

[syntaxhighlighter brush=php,first-line=1,highlight=0,collapse=false,html-script=false]function handle_output($output)
{
global $fusion_page_head_tags ,$fusion_page_footer_tags, $fusion_page_title, $fusion_page_meta, $fusion_page_replacements, $fusion_output_handlers, $settings;

if(!empty($fusion_page_footer_tags))
{
$output = preg_replace("#</body>#", $fusion_page_footer_tags."</body>", $output, 1);
}
if(!empty($fusion_page_head_tags))
{
$output = preg_replace("#</head>#", $fusion_page_head_tags."</head>", $output, 1);
}
if($fusion_page_title != $settings['sitename'])
{
$output = preg_replace("#<title>.*</title>#i", "<title>".$fusion_page_title."</title>", $output, 1);
}
if(!empty($fusion_page_meta))
{
foreach($fusion_page_meta as $name => $content)
{
$output = preg_replace("#<meta (http-equiv|name)='$name' content='.*' />#i", "<meta \\1='".$name."' content='".$content."' />", $output, 1);
}
}
if(!empty($fusion_page_replacements))
{
eval($fusion_page_replacements);
}
if(!empty($fusion_output_handlers))
{
eval($fusion_output_handlers);
}
return $output;
}[/syntaxhighlighter]

then in templates

[syntaxhighlighter brush=php,first-line=1,highlight=0,collapse=false,html-script=false] echo handle_output($output);[/syntaxhighlighter]

Yeah, that makes sense. I did but its not showing on the admin templates.

$output is what?

Do you include $output=""; where? But that will make all add_to_header() not displaying at all.
I'm wondering why $output and not $output=false. What about undefined error?

Templates define $output. see below

[syntaxhighlighter brush=php,first-line=1,highlight=0,collapse=false,html-script=false]$output = ob_get_contents();
if (ob_get_length() !== FALSE)
{
ob_end_clean();
}
echo handle_output($output);[/syntaxhighlighter]

Oh it caches everything. I see now.

Thanks Archer, I will see if I can fix it now.

NP :D

No wonder it is in the footer. It should be the last code there is then, especially if it caches everything. I'll have the atom

add_to_css and add_to_jquery function put in before that.