Advanced lazy load + Wordpress SEO output buffering fix

gistfile1.php

<? // just for syntax highlighting

add_action( 'template_redirect', 'lz_ob_start' );
add_action( 'wp_footer', 'lz_rewrite' );

function lz_rewrite()
{
  $buffer = ob_get_contents();
	ob_end_clean();

	$pattern         = '/((?:\<img).*)(src)/';
	$plugin_dir_path = plugin_dir_url(__FILE__);
	$buffer          = preg_replace($pattern, "$1 src='" . $plugin_dir_path . "shade.gif' ImageHolder", $buffer);

	echo $buffer;
	return true;
}

function lz_ob_start()
{
	ob_start();
}