Consistent libxslt error

Another person and I are consistently seeing errors when we run xsltproc, including not just our own files (which validate to docbook 5.0 in xmlmind) but also with the test files provided with xlstproc. The files are still created and all the links work. We are using current versions of libxml2 and libxslt.

C:\>xsltproc c:\xmltools\docbook-xsl\xhtml\chunk.xsl c:\xmltools\docbook-xsl\tests\refentry.007.ns.xml

Note: namesp. cut : stripped namespace before processing           Unit Test: refentry.007

WARNING: cannot add @xml:base to node set root element.  Relative paths may not work.

Note: namesp. cut : processing stripped document                   Unit Test: refentry.007

Writing rn01re01.html for refentry

Writing rn01.html for reference

Writing index.html for bookThoughts?

Ancillary n00b question: I thought the namespace declaration was key to
5.0, q.v. http://www.docbook.org/docs/howto/ . So why strip the
namespace?

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