If you want to use Telerik's rad controls in older versions of Internet Explorer (IE7 & IE8) then you will have to use a much older version of our software to ensure that it works by IE's old requirements. Since IE9, Microsoft has been moving closer towards the web standards that other browsers (such as Firefox and Chrome) implement. The latest RadControls version supported by IE8 is outlined here
. IE7 is very outdated and will have trouble handling controls that even IE8 displays. Even Google
has dropped support for IE8 and older. If it isn't possible to target a user base using newer browsers than IE7 and IE8 then it will be very difficult for you to work around issues stemming from newer releases of Telerik's software.