I have to give Greg McCary credit for the idea for this thread. After discussing ideas for threads, it was suggested a thread of people posting there bad negatives. Kind of a reference database for anyone who has problems.
So here's my contribution to get the ball rolling. It is still up in the air as to what the problem was with this. The consensus was a problem during developing at the lab, though some thought it might be heat damage or a light leak. I can say for certainty it is not a light leak. This is a roll of Portra 800 in 120, shot in a Yashica 124G.
So let's see them everyone. Post you problem engatives, along with the details of the shoot and developing. If you know what the problem was, please post that as well, if not hopefully we can figure out what went wrong.