I have 2 nodes, node 1 master, node 2 slave. Replication works fine 
(with postgresql 8.0.3, slony 1.1.0)
Suppose node 1 is down.
I want to promote node 2 to new master, so I follow the procedure :
step 1 : failover, ok
step 2 : drop node 1, ok
step 3 : store node 1 (new slave), store path and store listen, ok
step 4 : subscribe node 1 as receiver for the set, provider is node 2, 
ERROR : fe_sendauth : no password supplied

has anyone the same problem ?

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my node configuration :

first master :
node 1 localhost 5432
node 2 localhost 5500

first slave :
node 1 localhost 5500
node 2 localhost 5432

the 2 databases communicate via ssh tunneling (port 5500 to 5432).