gday...
Well, not many moving particles in my scenes, + it is a normal trip type video.
We also tried something else, on a tripod, for the AppleTV event couple of months ago, on another Mac. Same thing.
It is 1080i, I tried to reimport the video more than once, I got 4GhzRam on a MacPro.
NOTE:
Lately, I've tested another video cam, it's JVC HDD Everio [
GZ-MG275]. Works very nicely with (Firewire +iMovie 08) Problem Free
.