I have had this happen thrice now. At first I thought I imagined it, then I thought it was me (could still be) but it has just happened again - typing exit fails to save the blockchain. I was just taken all the way back to to block 267 or there abouts - I am relying on memory here, but is was definitely 2xx - having just completed the full block sync overnight.
So, is this a bug or does exit no longer save the block chain? If not, how do I save the blockchain. The odd thing is, last night it WAS saved at around 26000 or about half way synced. I tested it before I left it to run overnight and to have a recovery point.