A few weeks ago, I sold my M9 to a fellow forum member. Today, he contacted me concerned that the sensor may be failing. I looked at the sample photos he provided (posted below with his permission) and thought it was simply an artifact caused by an overloaded CCD, but he's still bothered because the green blotches appear in roughly the same area in all of the photos. We could use some some unbiased opinions here! I've renamed and scaled the photos to 1024 px but made no other changes.
Buyer also noted that the problems seemed to appear most often slow shutter speeds, but I felt it was simply a coincidence.
All photos have similarly blown highlights:
So what do you folks think: Hardware problem, improper technique or..?