well, one thing i have noticed is that when clips have audio or are very long / big, the whole bottleneck issue arises because it seems to me that your entire folder that is open is loaded into memory - and playing!!! this is probably to have them cued to make the smooth transition stuff, however even with 4gb memory on my laptop and many services shut down to open the processor for performance issues, it can slow down to the point where it doesn't even respond anymore and i have to kill the program. my dumb workaround for this is to have a video full-screen cued up behind the onyx presentation screen, and behind that a full screen logo...
suggestion: use folders with no more than 10 small clips and no audio.
cheers
--
Daniel Caleb Thompson
JOSEPH LEDOUX: "The most accurate memories are indeed the ones never remembered."