I have experienced jerky, halting video playback in iTunes on my Macbook from day one. Why, oh why, should I be seeing 5-10+ second freezes routinely on a machine with spec's like mine? I expect some performance issues streaming high-bitrate vids from my linux SAMBA server over wireless, but these are low-res, low bitrate podcasts stored locally I'm talking about. I mean, a big part of my decision to purchase a Mac is the tightly integrated iTunes podcast support and the oft-touted multimedia superiority of the Mac platform. Why can't this machine play back video in its default player and default formats as well as my 866MHz P3 with 256MB of RAM running VLC? And please don't reply with the "solution" to use Quicktime Player for video playback. Why should I have to resort to this kind of workaround when "It Just Works?"