Error from DocBook xsls: XTTE0780: Required item type of result of function f:normalize() is document-node();

[David Cramer <david@thingbag.net>]

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Hi there,
I'm using the xsl 2.0 stylesheets. When I set the preprocess param to
normalize:

  <xsl:param name="preprocess" select="'normalize'"/>

I get the following error:

Error on line 31 of 4-normalize.xsl:
  XTTE0780: Required item type of result of function f:normalize() is
document-node();
  supplied value has item type
element({http://docbook.org/ns/docbook}book, xs:anyType)
  at f:normalize()
(file:/home/dcramer/Downloads/docbook-xslt2-2.0.3/xslt/base/common/preprocess.xsl#106)
  at f:preprocess()
(file:/home/dcramer/Downloads/docbook-xslt2-2.0.3/xslt/base/html/docbook.xsl#73)
Transformation failed: Run-time errors were reported

I'm still trying to get my head around the way the xsls do
preprocessing, but I thought I'd see if anybody has seen this error.

Thanks,
David
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