Ensemble Studios today unveiled that a bug was discovered in Age of Empires III: The Asian Dynasties after the release of patch 1.01. A French home city card lowers the Church building cost to a negative number, so that a player can receive wood for placing a Church. Exploiting this bug in games is subject to a ban from online play. A new patch (v1.01a) to remove this issue is in the works and will be available next week.