Hello... this is Roberto here. Yesterday I purchased 20 Ths from you by mistake, while I tried to buy on 20 Ghs. Details: https://bitcointalk.org/index.php?topic=938228.0

My User ID: 4110

Please return 20 BTC to my address given at the time of account creation, i.e. 178c4wRt8gXQVi1qkcw3wXN3GQabUShGvA.