Postgresql with PAM-LDAP generating errors

[delerious010]

Ok, so I've got Postgresql authenticating through pam-ldap.
My users can logging and access the databases but on each login attempt I get the following syslog error :

[From the remote webserver]
authpriv notice authentication pam_unix(postgresql:auth): authentication failure; logname= uid=107 euid=107 tty= ruser= rhost= user=serafini

[From local psql]
18:44:33 cybrain authpriv notice authentication pam_unix(postgresql:auth): authentication failure; logname= uid=107 euid=107 tty= ruser= rhost= user=serafini
18:44:30 cybrain authpriv notice authentication pam_unix(postgresql:auth): authentication failure; logname= uid=107 euid=107 tty= ruser= rhost= user=serafini
18:44:29 cybrain authpriv crit authentication pam_unix(postgresql:auth): auth could not identify password for [serafini]
18:44:29 cybrain authpriv err authentication pam_unix(postgresql:auth): conversation failed

uid=107 is postgresql
user=serafini is a user in the LDAP database

[/etc/postgresql/8.2/main/pg_hba.conf] contains
host all all 10.0.0.0/24 pam postgresql

[/etc/pam,d/postgresql] contains
@include common-auth
@include common-account

[/etc/pam.d/common-auth] contains
auth required pam_env.so
auth sufficient pam_unix.so likeauth nullok
auth sufficient pam_ldap.so use_first_pass
auth required pam_deny.so

[/etc/pam.d/common-account] contains
#account required pam_access.so accessfile=/etc/security/access.conf
account sufficient pam_ldap.so
account sufficient pam_unix.so
account required pam_deny.so

Anyone have an idea ?