My first post to the list, not sure this is the right place, let me know if it is better to open an issue on GitHub.

This is occurring on OS X with Satoshi 0.11.0, the TXID and vout belong to the wallet:

command: lockunspent true "[ { \"txid\": \"fd697746c67f68a206bb7377fd40f35d146cc5821883e4c4b6cbf82b48e62a13\", \"vout\": 1 } ]"
output: true
command: listlockunspent
Output:
[
]

Additionally after locking the TX with lockunspent I am able to spend it from the wallet.

Cheers,

Ian