// i know, i know,  browser sniffing :(
// adaptation of http://stackoverflow.com/questions/8348139/detect-ios-version-less-than-5-with-javascript 
Modernizr.addTest('ios6', function() {

  var ios6 = false,
      v, ver = false;

  if (/iP(hone|od|ad)/.test(navigator.platform)) {
      v = (navigator.appVersion).match(/OS (\d+)_(\d+)_?(\d+)?/),
      ver = parseInt(v[1], 10);
  }

  if (ver == 6) {
    ios6 = true;
  }

  return ios6;

});





//usage
/*
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px)
and (orientation : landscape) {

	.ios6 .thing {
		background: red;
	}

}

*/