Gillian, I was a bit peeved, too, because I had just added military info and a military sticker (that which I find most difficult to do on WikiTree) and I had to redo it. I may have lost some other bits--I don't save as often as I used to. I may have to revert to my old habit of saving after each source again, though we've been told that is not good for WikiTree, but I forget why.