Instead of using print("<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">"); in your header.php and getting validation errors.

Paste this in your .htaccess file.print("<IfModule mod_headers.c> BrowserMatch MSIE ie Header set X-UA-Compatible "IE=Edge,chrome=1" env=ie </IfModule>");

It does the same thing as the meta tag, but saves the grief.