i've been experiencing on the last couple of films (1 tri-x, developed with diafine, 1 tmax 3200 developed with xtol) light leaks coming from the sprocket holes and coming onto the bottom of the frame.
I'm not sure whats causing this but its pretty annoying.. could it be my old patterson tank? Its always on the same side, along the bottom on both films..
The negatives also have uneven colour down the sides of the sprocket holes too (blotchy black).
heres an example i found online, not my photo..