Cons of using Internet Explorer's Compatibility Mode
问题 What are cons of force a web site viewed in IE to compatible mode? Say we force IE9 to IE8 compatiblity mode? Performance drawbacks Can't use any new IE9 specific features like HTML5/CSS3/SVG Why? We run legacy web app which is developed since 2000 so it's a mess ball fighting to be compatible with Chrome, Opera, Firefox, IE6/7/8 and now we decide to add IE9 to the list. But with IE9 we run in issues with printing, "Permission deniend" JavaScript errors (probably something about cross-frame