I'm still trying to find where the problem was. I _think_ there was some sort of...well, shall we say disagreement...between the film and my Rollei 6003, which puts I believe an uncommon level of bending and pressure on the film within its path.(posted 8419 days ago)This has been odd; film run through the camera showed marks/fog, film not run through the camera had no marks/fog, eliminating a processing problem imho...but then film run through the camera and processed by Ilford showed no marks/fog. (Thanks David!)
So..since then I've shot a bunch of Delta 400 in 35mm and several 120 rolls in a Mamiya 6 without seeing any problems, but since I got some more film from a different batch I haven't yet gotten around to running a test roll through the Rollei.
I've used D-76H 1:1, but now I'm using Ilfosol-S 1:14, which seems to be a particularly good match.