The output of the test svg/filters/big-sized-filter.svg is a horizontal gradient whereas it should be a gradient at an angle (as the original expected result showed: http://trac.webkit.org/browser/trunk/LayoutTests/platform/mac/svg/filters/big-sized-filter-expected.png?rev=51301). To be nice to our sheriffs, this test should probably be augmented so that the fail and pass cases are easier to determine.