I backed up my wallet, deleted the blockchain and attempted to re-download the blockchain.
I got this error:
"errors" : "WARNING: Checkpoint is too old. Wait for block chain to download, or notify developers."
Same here.
And here ...
ERROR: CSyncCheckpoint::CheckSignature() : SetPubKey failed
Not that I care much at the moment ... stopped mining weeks ago when developer seemed to busy to care ... a bit like now.
one4many