Just ran epubcheck on the file, which confusingly reports a bunch of warnings and then says 'no errors or warnings detected.'
Code:
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 422 column 41
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 422 column 41
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 422 column 41
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Warning at char 3 in xsl:param/@select on line 459 column 43
SXWN9000: The parent axis starting at a document node will never select anything
Validating using EPUB version 3.0.1 rules.
No errors or warnings detected.
epubcheck completed