I've only used it a bit, but it seems to be rather finicky about down-right and down-left (switch pads and return) -- it seems as though if I drag too far down before hooking over, it doesn't take it, but if I make a near-circular loop through the correct intersections, that works... Could it be losing track at the bottom edge of the screen? (Or could my screen not be reporting things well at the extreme edge, perhaps...)