clusterdb stopped working for PostgreSQL database in Ubuntu 12.04 server

Question

After a fresh PostgreSQL install (version 9.2) on my Ubuntu server 12.04, clusterdb utility stopped working. I used the same config files as I used with version 9.1.

Below is the actual command:

clusterdb -v -h localhost -p <port#> -U postgres -d <dbname>

And this is the response that I'm getting:

clusterdb: could not connect to database <dbname>: could not connect to server: Connection refused
    Is the server running on host "localhost" (127.0.0.1) and accepting
    TCP/IP connections on port <port#>?

I'm able to connect to the server locally and from outside. I can also use another utilities such as pg_dump with no problems.

My pg_hba.conf file below:

# Database administrative login by Unix domain socket
local all postgres peer
# TYPE DATABASE USER ADDRESS METHOD "local" is for Unix domain socket connections only
local all all peer
# IPv4 local connections:
host all all 127.0.0.1/32 md5
# IPv6 local connections:
host all all ::1/128 md5
# Allow replication connections from localhost, by a user with the replication privilege.
local all postgres md5
host all all x.x.x.x/x md5         #my network
host    all all  x.x.x.x/x  md5    #internal ip of the server

Are there any security changes were implemented in PostgreSQL 9.2 vs 9.1 that may prevent clusterdb to work properly?