Running the code to build an Atom syndication feed gives the correct XML but the xmlns attribute is inserted with an empty value to all children of the feed element:
<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
<title xmlns="">My Blog!</title>
<subtitle xmlns="">Others have blogs too, but this one is mine</subtitle>
<link href="http://example.org" xmlns="" />
<link href="http://example.org/feed.xml" rel="self" xmlns="" />
<author xmlns="">
<name>John Doe</name>
<email>[email protected]</email>
</author>
</feed>