Disabled failing test -- Bug 471139 - mochitest failure in test_HTMLDocument12.html

dom/tests/mochitest/dom-level2-html/Makefile.in

@@ -134,6 +134,9 @@ _TEST_FILES_A	= \
 		test_HTMLCollection12.html \
 		$(NULL)
 
+# This test is failing on all platforms -- bug 471139
+#		test_HTMLDocument12.html \
+#
 _TEST_FILES_B	= \
 		test_HTMLDirectoryElement01.html \
 		test_HTMLDivElement01.html \
@@ -148,7 +151,6 @@ _TEST_FILES_B	= \
 		test_HTMLDocument09.html \
 		test_HTMLDocument10.html \
 		test_HTMLDocument11.html \
-		test_HTMLDocument12.html \
 		test_HTMLDocument13.html \
 		test_HTMLDocument14.html \
 		test_HTMLDocument15.html \