Curiously, despite the different orientation the marks in shots two and three appear to be similar and in the same-ish place on the neg. Wouldn't that suggest some sort of leak in the camera? Possibly also combined with differing amounts of time between shots for the leak to darken the film to a different degree in the other shots.
Worker11811's idea of eliminating the light-leak possibility first might be a good one. It wouldn't need to use a whole roll as you can try a hood, or shoot from a shaded direction/location, to reduce flare on the same film - with/without hood in combination with/without camera-body blackout. Also, do the dark areas go outside the frame, on the edges of the film?
Ooops, forgot to say, I have used Lucky and there was a little halation around really contrasty bright areas, but nothing remotely like in your examples so it 'should' be something else.
Last edited by MartinP; 08-01-2011 at 02:02 PM. Click to view previous post history.
Reason: forgot something