The following layout test is flaky on Win Debug. fast/forms/validation-message-appearance.html See http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=fast%2Fforms%2Fvalidation-message-appearance.html In Win Debug, sometimes an icon of a validation message is not rendered, which causes a image failure. It might be related to the slowness of Win Debug bot.
We're going to remove this test when Bug 97727 is completed.