> The demo apps [...] complain that the room is too bright. Coincidentally, it's a stormy, overcast day, and my office lamp burned out this morning. This is as dark as it'll ever be in here during the day.
Could it be that it's aimed too much towards the screen? I mean, that's the most obvious remaining light source.
I wonder if your monitor's backlight puts out an inordinate amount of infrared light. I've noticed interference with IR remote control reception when one of my LCD monitor's backlights is turned down close to minimum brightness; I'm assuming that the PWM dimmer frequency (or one of its harmonics) is making it through the filter used by the IR receiver.
Could it be that it's aimed too much towards the screen? I mean, that's the most obvious remaining light source.