http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=fast%2Fspeech%2Finput-appearance-searchandspeech.html Seems like mic icon in the input box gets rendered differently (the difference is very slight, though). This only happens on Mac 10.7 bots.
Weird, why would this be flaky? Is it naive to expect the mic icon to be drawn the same way on each run?
Sorry, the difference is in the close button icon, not mic icon (I failed to look at the dashboard results). Still this flakiness is very strange.