Ok, I've tried to figure this out on my own, but am out of ideas. This happens randomly, no rhyme or reason, on about every other shoot I do. I have a D50, and when I am shooting, everything will be going fine for 10, 30, or more frames, then, out of the blue, when I press the shutter, absolutely nothing is recorded on the frame. The hotshoe trigger trips the strobes...they go off fine. It's not the sync speed, since it's happened at 1/100, and at all different speeds/apertures. I am shooting all manual. It always happens when the subject (usually a dog) has just given me the best pose...I shoot, the flash goes off, everyone gets all happy. But I've not gotten the shot. To me it seems like a problem between the electronics of the camera/trigger. I've used two different brands of trigger, they both do it. It will happen 2 or 3 frames in a row... I then do some things to try to get it to work...turn the camera off/on again, trip the strobes from the trigger itself, etc. It always starts working again, but I have NO IDEA WHY. I am losing good shots, and it's frustrating. Again, the strobes always go off, at the same time I press the shutter, but nothing is recorded. What is going on??