Feel free to blame me. We had an issue with a rather troublesome player with a dynamic IP earlier this week, thus I temp banned his IP range, and it seems you were innocently hit by it. You should be unbanned now.
If talking to Leo doesn't work, try changing your nick and/or your IP. (unplugging and turning off your modem then plugging it back in ten minutes later will work for most people)
... And thanks for encouraging people to go around bans, by the way!