You do have a light leak-it is in the camera
You do have a light leak-it is in the camera
This is my first post, and I registered just so I could reply to this thread. I had exactly the same light leak problem. My original thinking was that it had to do with the film canister or processing, but I was wrong. It was the camera. I shot 5 rolls with the same results as were shown in this thread--light leaks demonstrating these same patterns.
I sent the camera back to Hasselblad about 6 weeks ago. I phoned them about 3 weeks ago, and they said that they had sent the camera back to Japan for repair. I just got it back today, so I can't tell you if it is fixed or not, but am guessing it is (reason to follow). Time will tell. Most of the repair work slip which was with the camera when I received it today was in Japanese, however there was an English translation of the pertinent sentence "replaced entire inside of body, except for name ring." Your guess is as good as mine, but it is obviously not a minor problem.
I was having another symptom from the beginning, but I didn't know it was a symptom because I didn't have another ZI body here to compare it with. The shutter speeds were very difficult to read, and I kept wondering why there were no loud complaints on this forum about that. I have not had a chance to run a roll through the repaired body yet, but now the shutter speed read outs are vastly easier to read, so I am guessing that the two problems were related.
Noting that your light leaks look exactly like mine did, and noting also that the chances of it being anything but a light leak in the camera if it occurs on multiple rolls are slim to none, I would suggest that you not waste any more time or film. Call Hasselblad's service center and send it in as per their instructions.(mine went in before the change in distribution).
Hope this helps.