i've the same problem and couldnt find the right answer from google, but i found that i i couldnt even dump the db using pg_dump and the error was.
-bash-4.1$ pg_dump -f DBNAME-dump DBName
pg_dump: server version: 9.2.4; pg_dump version: 8.4.13
pg_dump: aborting because of server version mismatch
and that was because i followed the tutorial to install on Centos 6.4 and for this i had 2 versions of pgsql client installed.
i removed the version 8.4.1
yum remove postgresql-8.4.13-1.el6_3.x86_64
and then i copied the pg_dump and pg_dumpall from newer version installed in tutorial
[root@tedt ~]# cp /usr/pgsql-9.2/bin/pg_dump* /usr/bin/
then test cli dump and works fine and web dump works fine too.
i wish this solution works for you too.