Just got back from Little Cayman, I have a tg3 and it's about 1.5 years young. Never had any problems with it, over 6000 underwater shots and love the camera and quality of the pics (camera is so easy it makes me look good). Before the trip checked out camera and case and everything worked great. Got to Little Cayman and that night went to check out everything before our first dive. Turned camera on and I could hear a noise from the right hand side like a moter/focus was trying to engage and entire camera locked up, nothing would work. Switched batteries and no change. Removed battery for the night, got up next morning and did the official 'please don't fail me now dance (stand on your right left leg, face south/south east, right arm fully extended, left arm at a 45 degree angle with your lititle finger touching your bottom lop, hopping up and down while chanting "no no no". Well this seemed to work since in the morning camera was fine. Kitted up on the dive boat, was handed camera to.me, turned it on and it was locked up again (I was on the surface). Crappola!!! Well what did I miss? We saw two seahorses, a yellow with a black one 4 inches behind it! THE shot of the trip and I missed it. Also a scorpion fish but we did see one later. Got back on boat and checked camera, still locked up. After dive went to dive shop on site, called a shop in Grand caymen and bought a tg4, had it shipped over the next day and I was back in business . Used the old tg3 for above the water shots rest of the trip and it worked like a champion. Has anyone else had a problem with their camera locking up? Any idea's what could have happened? Any thoughts on what I can do with the old tg3? Leaning toward keeping it for above water shots and using the Tg4 as a dedicated dive camera. Tanks! Bill