The following tests fail on Windows: canvas/philip/tests/2d.composite.operation.clear.html canvas/philip/tests/2d.composite.operation.darker.html canvas/philip/tests/2d.drawImage.outsidesource.html canvas/philip/tests/2d.gradient.interpolate.colouralpha.html canvas/philip/tests/2d.gradient.radial.cone.front.html canvas/philip/tests/2d.gradient.radial.cone.top.html canvas/philip/tests/2d.gradient.radial.inside2.html canvas/philip/tests/2d.gradient.radial.inside3.html canvas/philip/tests/2d.gradient.radial.outside1.html canvas/philip/tests/2d.line.cap.closed.html canvas/philip/tests/2d.line.miter.lineedge.html canvas/philip/tests/2d.path.arcTo.collinear.2.html canvas/philip/tests/2d.path.arcTo.collinear.3.html canvas/philip/tests/2d.shadow.enable.blur.html canvas/philip/tests/2d.shadow.enable.x.html canvas/philip/tests/2d.shadow.enable.y.html canvas/philip/tests/2d.strokeRect.zero.4.html