Index: /trunk/doc/manual/Makefile.kmk
===================================================================
--- /trunk/doc/manual/Makefile.kmk	(revision 56549)
+++ /trunk/doc/manual/Makefile.kmk	(revision 56550)
@@ -684,8 +684,8 @@
 	$(call MSG_TOOL,xsltproc $(notdir $(filter %.xsl,$^)),,$(firstword $(filter %.xml,$^)),$@)
 	$(QUIET)$(RM) -f $(addprefix $(@D/),$(VBOX_SDKREF_LATEX_FILES_TARGET))
-#      check it for validity first.
-ifdef VBOX_HAVE_XMLLINT
-	$(QUIET)$(VBOX_XMLLINT_WITH_CAT) --dtdvalid $(VBOX_PATH_DOCBOOK_DTD)/docbookx.dtd $<
-endif
+##      check it for validity first.
+#ifdef VBOX_HAVE_XMLLINT
+#	$(QUIET)$(VBOX_XMLLINT_WITH_CAT) --dtdvalid $(VBOX_PATH_DOCBOOK_DTD)/docbookx.dtd $<
+#endif
 #	generate TeX source from processed docbook and store it in SDKRef.tex.tmp
 	$(QUIET)$(VBOX_XSLTPROC_WITH_CAT) --stringparam TARGETLANG en_US \
@@ -900,7 +900,7 @@
 	$$(QUIET)$$(VBOX_XSLTPROC_WITH_CAT) --output $$@ \
 		$$(VBOX_PATH_MANUAL_SRC)/docbook-refentry-to-manpage-preprocessing.xsl $$<
- ifdef VBOX_HAVE_XMLLINT
-	$$(VBOX_XMLLINT_WITH_CAT) --dtdvalid $$(VBOX_PATH_DOCBOOK_DTD)/docbookx.dtd $$@
- endif
+# ifdef VBOX_HAVE_XMLLINT
+#	$$(VBOX_XMLLINT_WITH_CAT) --dtdvalid $$(VBOX_PATH_DOCBOOK_DTD)/docbookx.dtd $$@
+# endif
 
 $$(VBOX_PATH_MANUAL_OUTBASE)/$(1)/$(patsubst man_%,%.1,$(basename $(2))): \