My blockchain is stuck at block #257923. Debug.log is full of these:
WARNING: ProcessBlock(): check proof-of-stake failed for block d11d8ba7a831b5255255b026923133842dd64b30ae7d82970310f7385b949148
received block efe4d5e10cf7ca6cc2cf
ERROR: CheckProofOfStake() : INFO: check kernel failed on coinstake eb1a72517503729351512204730094fab032b36c91ec3885509e900c92c2506f, hashProof=ee3c3e4949bfebf6583ca2b14509e4753d606d76d335d0d8039d507e20e4c860
WARNING: ProcessBlock(): check proof-of-stake failed for block efe4d5e10cf7ca6cc2cfd5b9a9976cc14db0bf58367fc6593c153988d78e1074
received block 80c7145295e0166b85f0
ERROR: CheckProofOfStake() : INFO: check kernel failed on coinstake 8bcdfd49147e974cd960b106de16fb5b1ec12fbbb2b08ab171ed1e9357e5ed7b, hashProof=0274a4151226c91ee405b2a76e8177f56ef83b2d6de7100d055826563eb1e30d
received block d107f9194ff3f60cd59d
ProcessBlock: ORPHAN BLOCK, prev=2a099458b259d6a1e173
received block 87dd8f6c7367ae995dc4
ProcessBlock: ORPHAN BLOCK, prev=35b892650896c7face3c