I've got a little problem - fresh installation of 10.3, on my new PowerBook - and restored data from my old iBook... I can play .MOV's and .AVI's etc. in quicktime that are already loaded on my computer, like some trailers etc. with no problem. But when I try to open files I've downloaded over file-sharing (like other trailers ) it says "Quicktime cannot understand this file". And when I try to play trailers in Safari I get the Quicktime logo where the film should be and then the beachball of death!! Safari crashes... I tried reinstalling Quicktime 6.5, but to no avail... Any ideas??