So I just lost my world of several weeks - over eight days time played, in fact. When I tried to pick up where I left off, either all of the items on my player shift IDs by 145, or possibly every item, or maybe even every block in the world. It's not entirely clear to me what happened, other than that the last time I had the server running, I was trying to cheatily transfer my fuel supply over to my relocated base area and the stack of void capsules I put into the fuel tank caused its master block to be removed. I cheated in a new fuel supply and carried on - but after saving and closing the server to do other things for a while, resuming was a no-go. Fortunately I have the old save from when I moved over from 0.8.2 still, so I only lost four or five hours of doings... still kinda bummed about having lost most of sunday's work.
Does anyone know why this kind of thing could occur? Obviously I need to start making backups more often, but it would be interesting to know how this mess happens, so I can avoid doing that again. So far the only lesson I've taken away from this is that I need to either give up on my old fuel supply or bite the bullet and just make a rail line from hither to yon and transfer the fuel and oil with tank carts.
Maybe I'll just transition into Forestry bio-fuel instead.