etc/modules/Gentocom_Page.xml
<?xml version="1.0"?>
<config>
    <modules>
        <Gentocom_Page>
            <active>true</active>
            <codePool>local</codePool>
        </Gentocom_Page>
    </modules>
</config>

code/local/Gentocom/Page/etc/Config.xml
<?xml version="1.0"?>
<config>
    <global>
        <blocks>
            <page>
                <rewrite>
                    <html_head>Gentocom_Page_Block_Html_Head</html_head>
                </rewrite>
            </page>
        </blocks>
    </global>
</config>

code/local/Gentocom/Page/Block/Html/Head.php
class Gentocom_Page_Block_Html_Head extends Mage_Page_Block_Html_Head
{
    /**
     * Check if current url is url for home page
     *
     * @return true
     */
    public function getIsHomePage()
    {
		Mage::log("logging");
		Mage::log($this->getUrl('')." - ".$this->getUrl('*/*/*', array('_current'=>true, '_use_rewrite'=>true)));
        return $this->getUrl('') == $this->getUrl('*/*/*', array('_current'=>true, '_use_rewrite'=>true));
    }
}