<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />
Now anyone visiting using Internet Explorer 8 Beta 2 does not need to click on the Compatibility View button to be able to use the menus. The meta tag makes Internet Explorer 8 render the webpage like Internet Explorer 7.
More details on this emulation in Introducing IE=EmulateIE7 on IEBlog.
Not many visit the site uses IE8 but according to Google Analytics 0.57% (the small red slice) of the visits last week was from users using IE8. IE7 is what most have followed by IE6. But I expect this to increase.
Have you checked your website or blog?