UpdatePanel & IE8: Constantly refreshing

I have an ASP UpdatePanel object embedded on a page. This page is actually used to display a custom web part in SharePoint 2010. What I'm wanting to happen is for my page to load and, almost immediately, I want my panel to render.

Here is the code I have...

<asp:UpdatePanel ID="UpdatePanel" runat="server" UpdateMode="Conditional"><ContentTemplate>..Abstracted Content..</ContentTemplate><Triggers><asp:PostBackTrigger ControlID="tmrAutoRefresh" /><asp:PostBackTrigger ControlID="tmrAccessToken" /><asp:AsyncPostBackTrigger ControlID="tmrDelayedFeedRender" EventName="Tick" /></Triggers></asp:UpdatePanel><div id="divTop"><asp:Timer ID="tmrAutoRefresh" Enabled="false" runat="server" OnTick="tmrAutoRefresh_Click" /><asp:Timer ID="tmrAccessToken" Enabled="false" runat="server" OnTick="tmrAccessToken_Tick" /><asp:Timer ID="tmrDelayedFeedRender" Enabled="true" runat="server" OnTick="tmrDelayedFeedRender_Tick" Interval="10" EnableViewState="true" /></div>

And here's my server-side event handler

        protected void tmrDelayedFeedRender_Tick(object sender, EventArgs e)
        {
            using (new SPMonitoredScope("redacted.tmrAccessToken_Tick"))
            {
                tmrDelayedFeedRender.Enabled = false;
                DelayedUpdatePanel.Visible = true;
                if (!string.IsNullOrEmpty(m_oUserEntities.RefreshToken)) btnLogin_Click(null, null);

            }

        }

This works perfectly in IE9, Chrome, & FireFox. In IE8, the panel is constantly refreshing. It's not obvious when looking at the page, but using Fiddler, I can see constant HTTP requests being made by my page. 

I'll apologize in advance for some of my abstractions, but I'm currently under an NDA.