Just wondered if anyone else has ever seen this sort of "nit" moving around in the image? It appears at the bottom of the central post at the start. It's inside the camera I reckon owing to my having cleaned the external window but seeing no evidence of anything on it anyway. At night, it's a white dot moving around, and vanishes if the IR illumination is turned off. It reappears if the deck lights are turned on. Without illumination, nothing shows. I assume it's a small insect...but don't really know, so wanted to see if anyone else had seen and figured out such.