I am getting similar issues, only the files are genuinely corrupted, even when I open them in Photoshop. Not only are the files often split, but many are off colour too. I have suspected it has something to do with Photo Mechanic since it was only once I started using Photo Mechanic that I have encountered this problem. That may, of course, not be the reason, but the correlation is there.. And there are a lot of them that are like that. Please seen the screen grab attached.