ASP.NET - Browser always returns "Page not found" message the first time I request the start page
<p>Whenever I start a new browser session and request the start page of my ASP.NET site, I am redirected to a different URL that is similar to the one I requested. For example, if I request the page</p>

<pre><code>http://myserveralias.xyz.com/virtualfolder/startpage.aspx
</code></pre>

<p>I am redirected to</p>

<pre><code>http://myserveralias.xyz.com/virtualfolder/startpage.aspx,/virtualfolder/startpage.aspx
</code></pre>

<p>If I remove everything after the comma and try again, the page loads without error.</p>
