Disable the test for bug 458898. See bug 562955.

layout/base/tests/Makefile.in

@@ -81,7 +81,6 @@ _TEST_FILES =	\
 		test_bug445810.html \
 		test_bug449781.html \
 		test_bug450930.xhtml \
-		test_bug458898.html \
 		test_bug465448.xul \
 		test_bug469170.html \
 		test_bug471126.html \
@@ -110,8 +109,10 @@ _TEST_FILES =	\
 		$(NULL)
 
 # Tests for bugs 441782, 467672 and 570378 don't pass reliably on Windows, because of bug 469208
+# Test for bug 458898 doesn't pass on Windows 7. See bug 562955.
 ifeq (,$(filter windows,$(MOZ_WIDGET_TOOLKIT)))
 _TEST_FILES += \
+		test_bug458898.html \
 		bidi_numeral_test.js \
 		test_bug332655-1.html \
 		test_bug332655-2.html \