I am encountering a similar problem to the problem description in forum entry
. This problem (the event not firing) has been tested and is "hard and repeatable". It occurs when selecting an item that does not show in the first displayed group of items. For example, I have a listbox with 20 items, but it is only tall enough to show 9 items at a time. Clicking on any of the nine items displayed when the page first loads correctly causes the SelectedIndexChanged event to fire. However, clicking on any item in the list that is below the first 9 will not produce the event and the selected item on screen will return to the originally selected item.
This is occurring in "RadControls for ASP.NET AJAX Q2 2009"; Telerik.Web.UI.dll, version 2009.2.701.35; IE 8.0.6001.18828.
If I run the web page in IE8 in "compatibility mode", the listbox functions correctly. This is not a satisfactory resolution.
Thanks in advance for any assistance!