In top of tree WebKit with accelerated compositing enabled, the poster circle live screenshot (with the hover effect that causes it to flip) disappears after navigating to one of the 3D CSS demos and then back. To reproduce: 1. Visit http://webkit.org/blog/386/3d-transforms/ 2. Click the link for "Poster circle" or one of the other demos like Morphing Power Cubes 3. Click the back button. Note that the Poster circle screenshot is now missing. Reloading the page causes it to reappear.
*** This bug has been marked as a duplicate of bug 32447 ***