Good idea, Patrick. It was indeed another program interfering. On the tiny chance someone has the same problem, it was a program called AltDrag , which I use to easily and quickly resize and move windows. It was specifically the "scroll inactive windows" setting. I unchecked that, and now ...

I'm having trouble with MouseEvents on a Windows 8.1 x64 Dell laptop w/ Synaptics trackpad. After setting up the hot corners for MouseEvents, I can move my mouse to a set corner and trigger the action (e.g. window catalog). Afterwards, however, if I move to this or any other set corner, nothing happ...