Using: Snow Leopard (10.6.3) with Minefield (Gecko/20100406 Minefield/3.7a4pre) and latest version of Flash (Version: 10.1.53.7 / Shockwave Flash 10.1 r53) When visiting http://www.doctoroctoroc.com/8-bit-dr-horrible/watch.html the flash animation paints over itself repeatedly. Viewing it in Firefox 3.6.4pre with the same version of Flash doesn't show that behaviour. Screenshots coming.
The flash object uses wmode=transparent and the object frame has a black background. We need to clear the offscreen shared buffer for the transparency to work.
Created attachment 437350 [details] [diff] [review] Clear OOP CGContext Buffer We need to clear the CGContextRef after each draw operation to support transparency.
Pushed to mozilla central http://hg.mozilla.org/mozilla-central/rev/1b80c3d9412f