can anyone tell me what thy are? i tried to import a 30 minute QT movie ( under 2 gigs, w/ motion jpeg compression) into imovie 3 & it choked midway. So I thought I need to export to DV stream first & did so. When I then try iMovie import I get msg. like "file too big" ( about 6 gigs) So I am wondering what the limits of iMovie are 7 why it chcoked on a simple 30 min QT.MOV any ideas? thanks!!!!