IE10 (9,8) does not recognize DOCTYPE xhtml
Change your DOCTYPE to:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">(using XHTML strict instead of transitional)
IE10 will stop throwing the error in the console. I'm not sure why IE10 doesn't like transitional XHTML any more. If anyone has a way for IE10 to recognize the XHTML 1.0 Transitional DOCTYPE, that would be awesome.
I was able to get rid of the error by using
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE9" />instead of
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
I had same issue. It worth looking at any external libraries you are using. I was using BXSlider and it wasn't happy with jQuery 1.8 on IE10. Due to which IE10 was failing and showing message.
HTML1524: Invalid DOCTYPE. The shortest valid doctype is "<!DOCTYPE html>My solution was to upgrade my JQuery to 1.9.1 and also include jQuery migrate.
<script src="http://code.jquery.com/jquery-1.9.1.js"></script> <script src="http://code.jquery.com/jquery-migrate-1.1.0.js"></script>Hope this helps someone.