Just wanted to say something that may be of help….
My video used to be very choppy for some reason. I had tried cs4 and cs5 with a very powerful system and no luck. Also, photoshop seemed to lag for some reason. i thought there was a bug in the adobe side of things until recently…
I had downloaded and installed a 10,000 font pack on my system that was the cause of this whole fuss i dealt with for over 6 months. I couldn’t believe the workflow speed once I removed it. It only took rebuilding my system several times to figure this out.
I hope this helps someone out there who has the same problem. REMOVE YOUR RIDICULOUSLY HUGE FONT PACK!!