Slony-I replication stopped working
OK, this was a nightmare but we figured but we resolved the problem. We were able to remove the servers using the slonik DROP NODE command. For a while the slony services was segfaulting repeatedly. We had to DROP NODE on all the slaves and then add and subscribe them again. This caused the tables to be dropped and then it ran a copy set to restore the tables. It is working again. We were very hesitant to run DROP NODE on these due to this being a destructive operation. However the replication servers are running as expected again.

I am so looking forward to turning off this service permanently.