I think many of the people are facing this issue. And I am also getting frustrated because of this. And I am in search of the quick solution of it. Actually the problem is with the animations which are being choppy on the snow leopard. It seems that, this is because of the vsync. I have tried using quartz debug to put out of action automatic beam synchronization. The moment it's disabled, the animations are silky smooth once more, just like how they were on Tiger. Please tell me what to do in order to fix this issue.
Bookmarks