Postgresql 9.4.4 - ERROR: invalid byte sequence for encoding "UTF8": 0x92

Hi,

I have recently migrated to 9.4.4 from 9.1. I did a dump and restore to migrate the database. When I try to connect using JDBC I am getting the following error, the database encoding is SQL_ASCII.
Same error with postgresql-9.4-1201.jdbc4.jar & postgresql-9.1-902.jdbc4.jar.

org.postgresql.util.PSQLException: ERROR: invalid byte sequence for encoding "UTF8": 0x92
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2270)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1998)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:255)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:570)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:420)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:305)
at com.sun.rowset.JdbcRowSetImpl.execute(JdbcRowSetImpl.java:567)

Command used to create the database
/usr/local/pgsql/bin/createdb --encoding=SQL_ASCII --template=template0 db_server

Thanks,
Prasanth