Hi,
On some of the old templates like IT Panorama there is no option for you, through the template manager, to disable the GZIP compression.

We will show you the way to do it through some changes.

First open templates/(templatename)/index.php


Find:
------
$this->_scripts = array_merge(array($template_baseurl . '/js/mootools.php' => 'text/javascript'), $this->_scripts);

Replace it with:
-----------------
$this->_scripts = array_merge(array($template_baseurl . '/js/mootools-release-1.11.js' => 'text/javascript'), $this->_scripts);



Find:
------
/*\*/@import url("<?php echo $this->baseurl ?>/templates/<?php echo $this->template ?>/css/template_css.css.php");/**/


Replace it with:
-----------------
/*\*/@import url("<?php echo $this->baseurl ?>/templates/<?php echo $this->template ?>/css/template_css.css");/**/


And for the last step just add the content of the attached file on your server on the templates/(templatename)/css/




If you have encounter any issue please reply here.