I recently updated my mac to 10.4.3, unfortunatley, since then, I have been experiencing a reaccuring problem w/ quicktime 7. Each and everytime I download a mpeg file and try to play it, quicktime reveals that it is not a file it understands (-2048). How can this be? Before updating to Tiger, all mpgs played fine under 10.3.9, QT v6.5.1. and all mpegs previously downloaded before updating play fine, however, any new downloads are rejected. After researching forums and websites. It came down to upgrading quicktime 7 to (Pro) and downloading the mpeg-2 playback. To my dismay, after shelling out $50 I am still unable to get the same satisfaction I got from my system before upgrading. Where do I go from here?