Created Unassigned: CalendarExtender parse a date value as NaN in IE8 [27827]

Hi all,

I have an issue when using CalendarExtender in IE8: When I add a TextBox and a CalendarExtender into page (like following code). Note that, I set SelectedDate for this extender

<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
<asp:CalendarExtender ID="CalendarExtender1" __SelectedDate="4/29/1996"__
runat="server" TargetControlID="TextBox1" >
</asp:CalendarExtender>
</div>
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>


After open the page contain this code with IE8, value in TextBox will be display as NaN/NaN/NaN

-This issue isn't happen with IE9+
-This issue isn't happen with older AjaxControltoolkit (like 4.5)

Are there any way to solve this issue ???