Created attachment 50512 [details] Opacity transition test with AC With AC enabled, opacity transitions first seem to work fine but after the transition is finished, the element is rendered again with the old opacity that was the starting point in the transition. Without AC the element's opacity correctly sticks with the new opacity value after transition. Attached a test case to demonstrate the issue.
This bug is also causing the images to become invisible in: http://www.satine.org/research/webkit/snowleopard/snowstack.html
Created attachment 50530 [details] patch for the bug #36019 Added a patch that fixes this issue.
Could you make a layout test for this?
Comment on attachment 50530 [details] patch for the bug #36019 Clearing flags on attachment: 50530 Committed r55966: <http://trac.webkit.org/changeset/55966>
All reviewed patches have been landed. Closing bug.