Silverlight is even more unstable for me in Safari, and Flash is fine for me in non-Safari browsers. I don't know if this is everyone's experience, but on my part I'm more inclined to blame Apple and Safari than Adobe.<p>On the slowness front, maybe Flash is slower on Mac, but it's hard for me to fault Adobe on this either (even as a Mac user). If I had finite resources, I too would allocate more of those to the majority platform.