I received this error from myetherscan (Paypie Presale) :
To:Contract 0xf8a15b1540d5f9d002d9ccb7fd1f23e795c2859d (PaypiePreSale) Warning! Error encountered during contract execution [Bad instruction] Value: 0 Ether ($0.00) Gas Limit: 250000 Gas Used By Txn: 250000