Will attach test page.
Created attachment 78290 [details]
When hovering the cyan rectangle, the blue and green rectangles should animate to the right and stay in sync. The blue rectangle animates left, the green rectangle animates -webkit-transform: translateX(). In chrome (which drives both animations in software) the two are in perfect sync. In Safari on Snow Leopard (Which drives the green rectangle's animation via CoreAnimation), the two are a good bit out of sync.