I felt I'd go for the extra-descriptive title ;-)
Launching in windowed is no problem, although it has yet to (after an hour) determine either size of local flock or time to render (this works fine on another computer). I've tried different resolutions, same result. Pressing Ctrl+f causes the program to crash, and the window disappears. Presently running at 1440x900.
Here's my CPU/Gfx card, in case anyone else is having problems with a similar setup:
Core i5 750
Nvidia GTX 260
This runs fine on my C2D laptop with integrated graphics, I don't understand why it doesn't on my gaming desktop.
Any suggestions? I can post any error logs if needed.
Oh, and I commend the author(s) for this program; best screensaver I've ever found, it's free, and evolves. Perfect :-)

what version graphics drivers
Thanks
1. I'm running driver version 8.17.11.9621 (release 1/11/2010).
2. I have ES v2.7 beta 23
3. Screensaver runs fine, save for not finding local flock count or getting rendering jobs.
Thanks again!
hm, that all looks fine. if