Bad blocks during test phase
geth-b> E0103 15:00:00.588548 core/blockchain.go:1231]
geth-b> ########## BAD BLOCK #########
geth-b> Chain config: {ChainID: 0 Homestead: <nil> DAO: <nil> DAOSupport: false EIP150: <nil> EIP155: <nil> EIP158: <nil>}
geth-b>
geth-b> Number: 77
geth-b> Hash: 0x2f271260f95e91a577dc92eab8f569d4cebcc98b09f0ab8b566707b366b13a8b
geth-b>
geth-b>
geth-b> Error: invalid merkle root (remote: a407f679bf3639af563b3b3a4b9befa31b2bcd8f0f6f2f9d7e5d47ca0672b3ec local: bb2a643583978786ca7eb259572b4533a68a88c35fe1cd37f496f5630dff4f91)