I am using Telerik Controls for my Project and it is working fine with Mozilla firefox but it is giving issues with IE 8.
I am even not able to use Telerik Controls on IE8 Browser.
Please help.
I am not sure about the version that you are using and I cannot reproduce the issue at my end with the versions 2011, 1, 519, 35 and 2010, 3, 1215, 20.
Please try upgrading to new version and see whether it helps. Updating RadControls for ASP.NET AJAX to another version or license.
Please elaborate your scenario if it doesn't help.