I would just add that you could take a piece of the cut-off leader, that is fully exposed to light, and put it in a dish of developer, paper developer would be fine. If it turns black, the problem was in your development. If it goes milky-white (and fixer then clears it), the problem is in the film.(posted 9673 days ago)Kenneth, could you please tell us the batch number printed on the film packet. If the problem was the film, it would probably apply to all films in that batch.