Ok, on my system I have 3 dedicated monitors (1680x1050 and 2x 1280x1024) and 2 secondary screens I only use part time (TV and projector, both 1920x1080). It seems to work fine on my 3 monitors except when I restore a snapshot, then it just mashes them all together on my main screen. But when I enable one of my other monitors it just goes nuts. Not only does it take twice as long for the monitor to enable (and the screen flashes around a lot more), but half my icons just disappear (some from in the fences, some just from the desktop). When I disable it again one of 3 things happens: either it goes back to normal, messes up any non fenced icons, or messes up the icons and makes all my screens turn off until I manually restart my computer. It's a neat little program, but since I enable/disable these screens daily to watch TV this is a complete dealbreaker.
Also, if you could implement a way to disable the icon animations that would be great. Having my icons slide into place just seems sluggish compared to the normal way they just snap into place.
My PC specs are Windows 7 Ultimate 64 bit, E8400 CPU, 2xGTX 275s in SLI with a 8400GT for extra monitors, 3.5TB of various HDDs, 4GB RAM, 780i mobo, 1100 watt PSU, and plenty of fans.