Hi guys, I'm a new member but I've always used these forums to diagnose issues with my Rolleiflex and Yashica Mat 124g. That being said, I just picked up an RB 67 Pro SD (to move away from TLRs) and all looked super clean/solid. However, upon receiving my first roll back I've been faced with this. Can anyone help me identify what might be the cause? I've asked a few film friends and they all think it has to do with either the back, how the film was rolled/loaded, or the shutter. I'm PRAYING it's not the shutter, however I notice that the marks are consistent with how the back orientation is set (if it were the shutter I believe the marks wouldnt have changed their position). Has anyone else had this issue? Any help would be amazing! Thank you.