title: problems with crossdomain.xml, silverlight 4
body: <p>For some reason my <code>crossdomain.xml</code> is never accepted by Silverlight and I'm getting the <code>SecurityException</code> everytime. I'm using SL4 and HTTPS. The server is offline to begin with, the first request fails. After 60 seconds, the client again requests for the <code>crossdomain.xml</code>, I return the file, as given below, but I get the security exception. I'm using Fiddler to return the file. </p>
  
  <p>Also interesting is that it works with <code>clientaccesspolicy.xml</code> but that is requested only the first time and all subsequent requests only ask for <code>crossdomain.xml</code>. The file is as below</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;access-policy&gt;
    &lt;cross-domain-access&gt;
      &lt;policy&gt;
        &lt;allow-from&gt;      
          &lt;domain uri="*"/&gt;
        &lt;/allow-from&gt;            
      &lt;/policy&gt;
    &lt;/cross-domain-access&gt;
  &lt;/access-policy&gt;
  </code></pre>