docbook5-style-xsl-1.74.0-1.fc10 is missing the VERSION file which prevents everything from building due to the line <xsl:include href="../VERSION"/> in the .xsl files.
Thanks for report, I wonder how I managed to make docbook5 document on my machine without that. Strange... anyway fixed and built as docbook5-style-xsl-1.74.0-2.fc1[01]