In the latest version of the Telerik controls, when the toggle type is set to "radio" and the button type is set to "linkbutton", the button no longer changes its background based on the selected/clicked button. This appears to still work for button type "standard". You can see this issue using your online demo using IE 9. Is there a hotfix for this issue or a workaround that restores the old behaviour for type "linkbutton"?