27 Apr Internet Explorer 9 Compatibility Cookbook for lists of changes that may impact your site or the Internet Explorer 9 Guide for Developers for a more complete list of what's changed. Today we are introducing a new resource that can help speed up the process of preparing your site: Compat Inspector. 22 Aug Compat Inspector is designed to help sites migrating to IE9 mode and up, not those running in legacy modes. You may still need to refer to documentation such as the Internet Explorer 9 Compatibility Cookbook and the Internet Explorer 10 Guide for Developers for some issues. The best pattern is to use. 20 Jan Compat Inspector is now available for IE Use Compat Inspector to quickly identify if Internet Explorer platform changes affect your site. Whether you're preparing for IE10 or still updating for IE9, run Compat Inspector on any page experiencing problems. Then watch for messages explaining potential.