ImageButton creates 404 error for YouTube link
<p>I have this link to <a href="http://www.youtube.com/agla4me" rel="nofollow">YouTube</a>: It works fine when you type or copy it to the URL box.</p>

<p>when I embed it in my code, it works with the anchor tag, but not with the <code>asp ImageButton</code>.</p>

<p>This code works:</p>

<pre><code>&lt;a href ="http://www.youtube.com/agla4me" &gt;&lt;img src="Images/youtube.png"  style= "border: none"/&gt;&lt;/a&gt;
</code></pre>

<p>This code does not work.  It will give you 404:</p>

<pre><code>&lt;asp:ImageButton ID="ibYouTube" runat="server" ImageUrl ="Images/youtube.png" PostBackUrl="http://www.youtube.com/agla4me"  /&gt;
</code></pre>

<p>I ran fiddler and looked at the request header, I saw ImageButton have pragma: no-cache.<br>
Does no-cache cause 404 error because youtube caches? If so, how do I turn off no-cache for Imagebutton.</p>

<p>Thanks</p>
