Ok....I did an apple -9 on the sequence and it tells me that my video is 29.97 and is using dvcpro compresor? I am now experiencing the same problem at the same place. I think there were many issues with this computer and I am probably dealing with the last one. The video had a gap in it a space. I deleted it and had to render again. Unfortunately its still happening again in the same spot. video plays ok on the camera if I just do a play.