I just upgraded my Powerbook g4 to Leopard from Tiger. Ever since the upgrade, I am having a difficult time streaming video from the internet, with sites such as youtube and Hulu. The video is quite sluggish. Now, I've done some internet research, and have discovered that this is a very common problem. I have not, however, been able to find a fix for this issue. Has anyone else been able to repair this issue with the Powerbook g4 and video streaming? Thanks.