Also, any individual miner/user who is on the short chain, to find out if you are on the wrong chain:
getblockhash 128510
53a832eee6d4120be9ab84cb34747b6cf59878c50c1f96eb30d12d104508cea1

If your hash does not match, please clean your data files directory, deleting everything except wallet.dat and restart.
Or restart with -erasechain=1