Update to Decadentwaste_Chromeframe

Observer.php

<?php
class Decadentwaste_Chromeframe_Model_Observer
{
	const HEAD_EXPRESSION = '{(<head[^>]*?>)}i';
	public function insertMetaTags($observer)
	{
		$body = $observer->getResponse()->getBody();
		if(strpos(strToLower($body), 'x-ua-compatible') === false) {
			$body = preg_replace(self::HEAD_EXPRESSION,'$1'.$this->_getTag(),$body);
			$observer->getResponse()->setBody($body);
		}
	}
	
	protected function _getTag()
	{
		// IE and Google Chrome Frame
		if(Mage::getStoreConfig('chromeframe_options/ie_compatibility/use_ua_compatibility') && Mage::getStoreConfig('chromeframe_options/chromeframe_activation/activate_toggle'))
		{
			$version = Mage::getStoreConfig('chromeframe_options/ie_compatibility/ie_version');
			return '<meta http-equiv="X-UA-Compatible" content="IE='.$version.',chrome=1" />';
		}
		
		// IE
		elseif (Mage::getStoreConfig('chromeframe_options/ie_compatibility/use_ua_compatibility')) {
			$version = Mage::getStoreConfig('chromeframe_options/ie_compatibility/ie_version');
			return '<meta http-equiv="X-UA-Compatible" content="IE='.$version.'" />';
		}
		
		// Google Chrome frame
		elseif(Mage::getStoreConfig('chromeframe_options/chromeframe_activation/activate_toggle')) {
			return '<meta http-equiv="X-UA-Compatible" content="chrome=1">';
		}
	}
}