I've been using Harman DPP for over a year, in both 4x5 and 8x10 sizes, and haven't seen this problem. However, early on in their US distribution they were selling 4x5 that was exactly the print size, not the sheet film size, necessitating it to be cut down to fit into sheet film holders. I wonder if this pack was the sheet film size that had then been mistakenly cut down a second time, making it too small.

It's a great product, however, and I would not hesitate to keep using it.