Odd, in tactical combat (as with the strategic map) I've got edge of screen scrolling across the whole of the battlefield.
Only change I have made to a clean 1.0 install is to set the following in the "mygames/fallen enchantress/prefs.ini" (so that I could run full screen at less than native resolution)
UseDesktopResolution=0
Fullscreen=1
Which may or may not be the reason I've been able to edge scroll.
P.S. I'm assuming everyone has already got the Edge Scroll option checked in the General Options.