Well, shucks. On the film roll loaded immediately after the Leaky One – within just five or ten minutes of that previously-shown light-stained shot – the results now appear 100% leakless, including the snapshot above.
Mystery leaks: they happen. I’ve read about cameras that have been sent to one expensive technician after another, and yet the leak was never found. Or maybe it’s some subtle mistake I made for that one roll. Lens change? I doubt it.
Every photo should have an element of mystery, sure. Just usually not this kind.