UPDATE: I have gotten the camera to stabilize somewhat by keeping the ambient temperature constant. I narrowed down the times it was flaking out to the time of day that the sun peaked through the window and hit the camera. The sun was not hitting the lens, but it seemed to be heating up the camera. I used an IR temp gun to measure the case temp and it was not over the 50 degrees celsius that the camera is rated at, so maybe I got an overly sensitive one or something. I went ahead and bumped my rating up to 3 stars, which is probably overly generous.