one of the guys I work with had a good suggestion that's working well for me. Nudge the monitor down just a tad so there's a small 'wall' in the top (or bottom) corner to catch...

http://grab.by/1kfI

FYI to other readers, Cinch won't trigger itself if you drag a window to the "seam" between monitors on your desktop if you're using multi-monitors. It only appears to trigger if you drag to an edge on your desktop.

But pxlpshr's fix above appears to work fine. :)

it works with dual monitors but you just have to be very delicate and move the mouse extremely slow which defeats the purpose.