fast/media/mq-transform-02.html and fast/media/mq-transform-03.html fail with HW Compositing disabled I assume we have some bugs in our software-compositing path. I'll attach the failing diffs. This was discovered while building a workaround for bug 28624 (which disables HW compositing on leopard). Once we have a fix we can easily use layoutTestController.overridePreference() to turn off hardware compositing for individual tests and ensure that the software compositing path remains tested, even when we turn back on HW compositing for Leopard.
Turning off hardware turns off 3d transforms, so this behavior is expected.
Sounds good. In my patch on bug 28624 I added some updated results for mac-leopard.