Maybe they are "MICKEY MOUSE EARS". These are rather common in machin developed films and a problem for many labs. A "mouse ear" borns when the fluid surface of the sprocket hole bursts on the film when it's coming to the dryer from the last wash which is usually a stabilizer or some photo flo solution. The mouse ear is a mechanical defect on the emulsion side of the film, it's something of a crater, and the edges looks darker.I remember some older film processors having an "air knife" before the dryer cabinet of this reason.(posted 9178 days ago)