Nope, just the wallet.dat (and the logs and peers.dat).  There's a .lock file dated 7/2 though...

I do have wallet backups taken before the last 3 updates. Perhaps there's an issue with the most recent one. I had 4.0.2 running often (and staked quite a bit) since roughly 8/14/2015...

Perhaps I should try the wallet.dat from 7/2?