I'm a bit puzzled by some film processing results from last night. I processed two rolls of Arista II (APX 400) in one tank (AP Compact) with Ilfosol 3 (fresh, one-shot, 1+9 dilution for 10 minutes at 18C.) They were stopped for 30 sec in Kodak indicator stop, and fixed for 3 minutes in Ilford Rapid Fix, then washed per Ilford's recommendations. I've examined the negs this morning after drying, and one roll has very good contrast, with black-blacks (including the edge lettering) and is nice and clear on the edge of the frame. The other roll, seems to have a grey cast to the clear parts, is lower contrast, and the edge lettering seems dark grey instead of black. I can't honestly say which roll was on top in the tank, but the they were both well covered. Agitation seems OK, because each roll is very evenly developed. I would have chalked it up to different exposure between the two rolls, except that the edge and edge lettering are different as well. Anyone have any suggestions as to what happened?