Using jQuery multiple selector (comma) with XML context argument
<p>I've been using jQuery selectors to grab data from an XML document.  This generally works as expected, but I've found that one thing I can't do is use the multiple (comma) selector.</p>

<p>The comma works when the context argument is a DOM object, but when it's an XML document, I get an empty jQuery object back.</p>

<pre><code>$('one, two', xml) --&gt; []
</code></pre>

<p>I can get the intended result by using jQuery's add:</p>

<pre><code>$('one', xml).add('two', xml) --&gt; [&lt;one&gt;&lt;/one&gt;, &lt;two&gt;&lt;/two&gt;]
</code></pre>

<p>Not a huge deal, but I'm wondering: is this expected behavior?</p>

<p>Edit: I've just discovered that this is only true when the elements have a namespace prefix.  Yet it picks them up fine individually, and adding the namespace prefix (with or without the multiple selector) gives me [].</p>
