Ah well, I'm glad it's not just me! It only happens about half the time, the last time was a roll of Acros I'd exposed fully in the space of no more than half an hour so it wouldn't have unwound in that time, it just didn't wind on tightly enough in the first place. The roll of APX100 I'd used in the previous half hour was fine
. Naturally, the best shot was the one most light affected. I enjoy using the camera, I just wish it was more reliable!