I bought a new "H" with Real Sense from Costco a month ago but been quite ill since then so I'm just now setting it up and flying it. Initially it flew flawlessly until yesterday when all of sudden in mid-flight and the middle of an assignment my stills developed the horrible "uncorrected lens curvature along the horizon" issue big time. I wasn't taken video so I didn't test that function. Needless to say I and my client were very upset and the shoot was suspended. To my knowledge there didn't appear to be any settings changes on my ST16. I can't find anything that gives me a clue on what might have happened and thought I'd come here for any suggestions anyone may have. Batteries were all good. Beats me. I tried to send photos here but photos are on my pc and don't know squat about URL etc. Any thoughts would be appreciated.