describe below the steps to reproduce the error
1. Add an RadRibbonBar with handlerEvent in Control Click and add a button
2. Add an RadTextBox control with MultiLine property = 10, ID = "txtTetst"
3. in the Load event Add the following code
if (!IsPostBack) txtTetst.Text = "Hello!."
5. Enter a new value txtTest without leaving the focus of control, click the button of RadRibbonBar added
The value is not updated, this happens to me in Chrome and Opera I think Fatal Error