I'm getting a javascript error "this.btnEl is undefined" using latest code from SVN and copy-pasting example from examples explorer.

Any ideas?

Example:
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="cb2.aspx.vb" Inherits="Autochart.cb2" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    
    <ext:ScriptManager runat="server" />
    <ext:CycleButton ID="CycleButton1" runat="server" ShowText="true" PrependText="View As ">
        <Menu>
            <ext:Menu ID="Menu3" runat="server">
                <Items>
                    <ext:CheckMenuItem ID="CheckMenuItem1" runat="server" Text="Text Only" Icon="Note" />
                    <ext:CheckMenuItem ID="CheckMenuItem2" runat="server" Text="Html" Icon="Html" Checked="true" />
                </Items>
            </ext:Menu>
        </Menu>
    </ext:CycleButton>
    

    </form>
</body>
</html>