Invalid checkpoint problem.
I upgraded my wallet last night. Dumped the whole dir except my wallet.dat file and let the blockchain rebuild. I looked at my wallet this morning and I'm getting the notice at the bottom of the window about an invalid checkpoint. What's the deal with that?. I have had 6 payouts from the pool I use.. and none of them are showing up.
It seems like your wallet caught a bad block from an obsolete peer. Please re-sync with v2.2