Ok, then if the transaction "never made it to the blockchain":
- how can Cryptsy show it in the "Pending Deposits"?
- where are these 700 NRB? Just gone? :/

Is it possible that a transaction doesn't exists but the coins are gone from the wallet?
My knowledge is limited here so if you have any explanation I'm interested anyway .

What prevents me from having the same problem again tomorrow?

Thanks again.

Ps: I see a "return transaction" disabled button on the wallet. Is it suppose to be implemented yet?