I am having serious problems with the D800's NEF files. Even when I transfer files by wire from the D800 to my PC, the end files are corrupted. This occurs when using Transfer NX2, Transfer NX1 as well as a simply copy over on the PC (although that method is safer in my experience).
The issue exists with both the CF card slot and the SD card slot and has resulted in the loss of several hundred RAW pictures over three shoots. This is the most serious failure I have experienced with Nikon equipment to date (I have had D70, D40 (two), D90, D3000, D300, D3100 and D7000 cameras without problems). I believe it must be an incredible embarrassment to Nikon given that they had an extra year to get this camera ready (due to the Thai flood).
If anyone has had any success with any program (I have tied a couple including Phoenix) in recovering the corrupted files (Nikon Transfer deleted them from my CF card after the corrupted import) I would appreciate your letting me know. The NEF file is there (at 40mb), but it just cannot be rendered.