I've been using efke pl 100 for years now in 8x10. I bought 4 boxes of 50 sheets and only had a problem with the first few because I used stop bath. When I switched to a water stop in the jobo, I haven't had a problem since. All of a sudden, 90% of the way through the 3rd box, I'm getting pinholes!! I use the exact same processing procedure as I always have:
Jobo, Pyrocat- HD, water stop, TF4, 30min wash.

Does anyone have any experience with this? I spent a lot on this film and I would really hate to have to junk it because the emulsion is either defective or going bad!