Hi

I'm not that newbie, or at least i thought so, but I think I have been hacked and I wondered if someone can hint on how.

I used my account in blockchain.info for satoshidice gambling from address 16io8zfbhStqe9WVdHN3JLzc29D73okaoy.
On Saturday, 45 minutes after a the last satoshidice transactions, an unknown transaction emptied my wallet.

First, I assume I have nothing to do with it and the coins were lost, correct?
Second, can anyone help me understand what happened? I used blockchain.info both on my computer and my Android smartphone.

Thanks, Haim