get error on 'eth.getPrivateTransaction'

[laurivers]

I deployed the sample contract code ('private-contract.js') successfully,and could call the private.set()and private.get successfully. But when I called eth.getPrivateTransaction, got error like this.

> private.set(40,{from:eth.accounts[0],privateFor:["6CZ/yNFFCVXxPFFGKLDwo0h1HXSgJsWEH11ddZhRVlo="]});
"0x281125ea71298123c16574c8818732c20a1e4352292c4eafc4b63887499f55a4"
> eth.getPrivateTransaction('0x281125ea71298123c16574c8818732c20a1e4352292c4eafc4b63887499f55a4')
Error: invalid character '`' looking for beginning of value
    at web3.js:6355:37(47)
    at web3.js:5089:62(37)
    at <eval>:1:26(4)

> eth.getPrivateTransactionReceipt('0x281125ea71298123c16574c8818732c20a1e4352292c4eafc4b63887499f55a4')
Error: invalid character '`' looking for beginning of value
    at web3.js:6355:37(47)
    at web3.js:5089:62(37)
    at <eval>:1:33(4)

[baptiste-b-pegasys]

see https://github.com/ConsenSys/quorum/issues/1642