There are very good tools out for migration from Mysql to PostgreSQL. EnterpriseDB has the migration studio which will help to migrate Mysql to PostgreSQL.
invalid byte sequence for encoding "UTF8": 0xe3ba27 HINT: This error can also happen if the byte sequence does not match the encoding expected by the server, which is controlled by "client_encoding". ERROR: invalid byte sequence for encoding "UTF8": 0xee6c65 HINT: This error can also happen if the byte sequence does not match the encoding expected by the server, which is controlled by "client_encoding". ERROR: invalid byte sequence