At “ComboBox / Load on Demand modes
” demo you can observe the RadComboBox behavour with our latest version.
Additionally I can suggest you download a trial version of our latest release - Telerik.Web.UI.2011.3.1115 - from your account and test how your application works with it.
the Telerik team
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed