Having a problem with vegas 4. I am using mpeg1 video and nearly every clip I have tried to edit in vegas 4 comes up with a black screen after about 5 seconds, i have found that you can edit out the first 5 - 10 seconds and then it seems to play ok but i don't really want to edit all my clips into little chunks? so, is this a known issue with vegas 4 or is there something simple i am missing? I have used vegas 4 for a while with no major issues with mpeg1 & 2 plus jpeg and any number of audio files together. MY system is XP home SP2, plenty of ram etc...