gleongelpi...i just tried to deliberately max my system resources while i watched a movie.
the movie did indeed drop frames (which would make it look jerky), to try and keep up with the stream. this kind of problem isn't reeltime's fault, it's just too much of a burden on the computer. i often get the same type of issue when i watch tv on my computer while i'm using another resource intensive programm.
maybe this will turn out not to be your issue, but the more i look at it, that's what it appears to be.
and honestly, that is the best possible scenario, because that means there isn't a flaw in reeltime's software. it's just an unfortunate fact of life in the computer world: lifespans are short.
i think at some point, reeltime will release a more detailed 'minimum requirements' list, once they figure out how different computer systems handle the program.