I’m having the same issue. I have tried to reset the scratch disks, not sure if I did that the right way (any tips would be appreciated). I’m using a macbook 2ghz, 2gb intel core duo, FCP5 trying to edit footage shot on a Z1U. The footage was given to me by a friend who transferred it and it’s a .mov file. I can see everything i’ve edited so far, but the footage will not render, and I can’t seem to view the other footage in the view window. Any tips, help would be appreciated!