asp net 4 - autopostback doesnt fire in ie6
<p>OK, Im really stumped and hoping this is something simple.  I have a form that relies on an autopostback of a radiobuttonlist to show or hide something.  This was really elaborate at first and working fine, until I tested in IE6.  The code below is as basic as I can get, all my code behind does is update the label to the radiobutton's selected value on click.  This works in IE7 and 8, but not in IE6, what gives?</p>

<pre><code>&lt;%@ Page Title="" Language="vb" AutoEventWireup="false"  CodeBehind="testpostback.aspx.vb" Inherits="Checkout.testpostback" %&gt;
&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt;

&lt;html xmlns="http://www.w3.org/1999/xhtml"&gt;
&lt;head runat="server"&gt;
    &lt;title&gt;&lt;/title&gt;
&lt;/head&gt;
&lt;body&gt;
&lt;form id="form1" runat="server"&gt;
&lt;asp:RadioButtonList ID="radio1" runat="server" AutoPostBack="true"&gt;
    &lt;asp:ListItem Text="Check1" Value="Check1" /&gt;
    &lt;asp:ListItem Text="Check2" Value="Check2" /&gt;
&lt;/asp:RadioButtonList&gt;
&lt;asp:Label ID="label1" runat="server" Text="none" /&gt;
&lt;/form&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>
