WOW, I got my ACD today, and it's just HUGE! Also got dual link adapter, and I noticed something strange...
In settings, I rearranged the monitor locations by dragging them to the other side of each other, to match their physical locations. My Geektool items disappeared, but a couple were peeking out from the far side of one screen. I flipped them back, and there they were. My mouse arrow couldn't reach the ones to the left prior to that, and was as if there was an invisible third screen, if you follow me. It's like it wants a third monitor plugged in or something!