Object function Function() { [native code] } has no method '_registerScript'
<p>I have site which has updatePanel and it is hosted on a web farm. Ive noticed that sometimes when  I hit ctrl + r there is an js error:</p>

<pre><code>Object function Function() { [native code] } has no method '_registerScript'
</code></pre>

<p>Requests before <code>ctrl+r</code> and on <code>ctrl+r</code> are made to the same server.</p>

<p>What can be the sause of this problem ?</p>
