Just as an fyi, I got a box of Ilford Delta 100 4x5 that is not 5 inches long. The sheets measure anywhere from 1/4 to 3/8 short. I have notified my dealer, who says from my reading the box label to him, that it is lot 36. I have no fears that Ilford will cover it promptly.
I just started on a box of Fotokemika Efke PL 100 M iso 100
4x5. About 10 sheets into the box the sheets started coming up without the familiar notch. For about 5 or 6 sheets I thought I was losing my mind . . . all alone there. . . in the dark. Apparently the process to make the notches failed during production.
I think that it would be helpful to correct the subject line. I assumed that you were talking about Delta darkroom products until I saw the actual post. Put Ilford in there so that Simon will see it and respond.