Someone posted information about a POS coin that sounded very good and it was hard for me to track down the wallet or information.  It doesn't have an announcement here.  A saw a lot of posts about it on another crypto site, and bounties given to addresses that were being posted in the thread.  It was one of the bigger other sites so I trusted that it was real.  I installed the wallet and bought some of the coins and after that I got a block index error which I posted below on several of my wallets.  The only one that didn't seem affected was 808 coin.  I read that to resolve this, just delete everything but the wallet.dat and restart the wallet and that seems to be working (it was a secondary computer that didn't have a lot of valuable coins on it).

But, I'm wondering, if this could have come from the wallet?  The wallet/coin is Koi coin.   I titled this as "possible" because I don't know.  I'm new to POS wallets and I wanted to learn more about them and as any tech knows, the way to learn is to solve a problem, often your own.