Forcing IE 7 Compatibility in Internet Explorer 8

If your website doesn't display correctly in Microsoft Internet Explorer 8 but works fine in the IE-7 Compatibility mode, you can force the browser to automatically render your pages in IE-7 Compatibility mode by simply adding the META tag:
<meta http-equiv=”X-UA-Compatible” content=”IE=EmulateIE7″ />

Microsoft plans to address the compatibility issues with Internet Explorer 8 by building a community-driven list of websites that require the browser to render in IE-7 Compatibility mode so the users would not have to manually switch from the native IE-8 rendering mode - the browser would retrieve a fresh copy of the list periodically through updates.