I developed a roll of b&w film last night. I followed the procedure that I've been using (from memory). After I rinsed the film and viewed it, I saw that about 1/2 of the roll was black. There appeared to be a graduated fade to black from the first few frames to the last. If I had to guess I would say that some light got in the camera some how. However, this has never happened before using this camera ( a rolleiflex TLR). Also, I was pretty carefull when I unloaded the film from the camera - it was very dark in the room. Also, the film had traveled to and from Arizona by plane so it went through the normal security x-ray scanners. But, they always say that unless the film is a very fast - high speed film, the scanning should not be a problem.