<p>Is there any way to display scrollabletext in loose xaml?  The equivalent in HTML would be </p>

<pre><code>&lt;div style="overflow:scroll"&gt;some long bit of text here&lt;/div&gt;
</code></pre>

<p>Can you do this in loose xaml?  </p>

<p>From my experiments so far it seems that in loose xaml:</p>

<ol>
<li>You cannot use TextBox -- it must be TextBlock. </li>
<li>TextBlock doesn't seem to have any styling settings which would make it scrollable.</li>
<li>ScrollViewer doesn't seem to be allowed in loose xaml.</li>
</ol>

<p>Any help gratefully appreciated.</p>

Typically, if you see an issue with authentication where it works in IE 6 but not IE 7, I'd check to make sure Kerberos is configured correctly.
Running as Network Service, your Kerberos SPNs should attached to the machine account.  As a domain account, the SPN's need to be on that account.
As to why IE 6 is different than IE 7, its most likely due to some of the Kerberos HotFixes that apply to CNames and ticket time outs. Search MS Support for "kerberos HotFix"
To turn off Kerberos for the site:
cscript adsutil.vbs set w3svc/###/NTAuthenticationProviders "NTLM"
Where ### is the SiteID from the MetaBase.