I am having a horrible time playing back clips recorded on my HF-100. The playback in CS4 is very choppy to say the least. I have tried importing the clips to an external FW800 drive, importing to the internall HDD, and tried playing back directly from the card. In all cases playback in the source window was unacceptable. I have set playback quality to draft and made the preview size 10% and it still doesn't play smoothly. I have a MBP 2.4 GHz Intel Core 2 Duo with 4GB RAM. The HDD is 7200 rpm. Anyone experiencing similar issues?