I recently bought a canon a620 and underwater housing. I tried it for the first time in the pool during the scuba classes. I took pictures which were great. I took video at 320/15 and it was great. Resolution is poor in full screen. I then took video at 640/30. I noticed playback was jerky from the camera. I loaded it to my computer and playback was dynamic at full screen. I copied the video to CD and the play back was jerky again. I would like to be able to give the students of the scuba class copies of their first dives. I am currently trying to load the pictures and video into Pinnacle to make a DVD edited movie but so far I am having problems. Any solutions? am I missing something?