We need to upgrade our existing Telerik.Web.UI.dll to the latest release because IE9 users get 'undefined' when clicking on the radbuttons and the new Telerik.Web.UI.dll seems to take care of that issue. The last time we deployed a new Telerik.Web.UI.dll to our production servers, every customer had to clear their cookies/cache before they were able to use our site properly. We would like to avoid the disruption to our site, not to mention the thousands of calls to our technical support line. Is there a way to avoid this? What is the proper way to deploy the new Telerik.Web.UI.dll?