FAIL: jdk6.0-b46 PASS: jdk6.0-b45
Following tests are failed because of wrong Document.getElementsByTagNameNS():

api/org_w3c/dom/Element/index.html#HasAttributeNS[HasAttributeNS002]
api/org_w3c/dom/Element/index.html#RemoveAttributeNS[RemoveAttributeNS002]
api/org_w3c/dom/Element/index.html#RemoveAttributeNode[RemoveAttributeNode004]
api/org_w3c/dom/Element/index.html#RemoveAttributeNode[RemoveAttributeNode005]
api/org_w3c/dom/Element/index.html#RemoveAttribute[RemoveAttribute004]
api/org_w3c/dom/NamedNodeMap/index.html#RemoveNamedItemNS[RemoveNamedItemNS006]
api/org_w3c/dom/Node/index.html#SetPrefix[SetPrefix014]
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code to reproduce : GetElementNSTest.java
======================================================================================
import java.io.IOException;
import java.io.PrintWriter;
import javasoft.sqe.javatest.Status;
import javasoft.sqe.javatest.lib.MultiTest;
import javasoft.sqe.tests.api.javax.xml.parsers.DocBuilderWrapper;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;

public class GetElementNSTest{

public static void main(String[] str){
GetElementNSTest test = new GetElementNSTest();
test.HasAttributeNS002();
}

public void HasAttributeNS002() {
         String data =
"<?xml version=\"1.0\" ?>"
         + "<!DOCTYPE test:root ["
+ "<!ELEMENT test:root ANY>"
+ "<!ATTLIST test:root test:a CDATA #FIXED \"qqq\">"
+ "]>"
         + "<test:root xmlns:test=\"http://xxxx.xx/\">"
+ "</test:root>";

         Document document = null;
try {
DocumentBuilderFactory docBF = DocumentBuilderFactory.newInstance();
docBF.setNamespaceAware(true);
DocBuilderWrapper docBuilder = new DocBuilderWrapper(docBF.newDocumentBuilder());
document = docBuilder.parse(data);
} catch (ParserConfigurationException e) {
         System.out.println(e.toString());return;
} catch (IOException e) {
         System.out.println(e.toString());return;
} catch (SAXException e) {
         System.out.println(e.toString());return;
}

        Element root = (Element)document.getElementsByTagNameNS("http://xxxx.xx/", "root").item(0);
//root is null
        if (root.hasAttributeNS("http://xxxx.xx/", "a")) {
            System.out.println("OKEY");
return;
        } else {
            System.out.println("Returned false. Expected true");
return;
        }
    }
}

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I checked jck results:
jdk6.0 build 46: FAIL
jdk6.0 build 47+: PASS