#17. "RE: A possible bug with Nikon cameras with dual card slots...." In response to In response to 14
Yes, using the grip but it is OEM. And no, not touching the other shutter button. In fact touching the shutter button causes writing to stop and sometimes but not all the time I can actually review the same picture that is already on the card by pressing view button. So I think writing is fake. It only takes split second to write one file. I think camera is doing something else that manifests itself as writing.