Hi journeyman, The only way for BTC to be removed from your account once it has arrived there is to be withdrawn by someone that is in possession of your PIN. How many characters do your passphrase and PIN consist of? If you have never entered your PIN at login and have always used silkroadvb5piz3r.onion then you should check your system for keyloggers, dataloggers and rootkits as any one of the three could log your information and send it back to a third party. If you have ever accessed your Silk Road account using onion.to they will also have a log of your passphrase and password. Libertas