I agree with your hunch, because the Mac OS X screensaver files are designed for single-display use only, and Im pretty sure Flurry has been right single-display from the start. (If it was possible, Im sure Idve found it as Ive been hunting for a solution for this problem for about 4 years now xD) Maybe there is a free alternative screensaver out there (again, Ive had no luck in finding it) which looks identical but can do a single 2-screen flurry.