MysqlContext uses the database's default character encoding, which for some MySQL deployments will not be unicode-preserving, resulting in inability to round-trip legal unicode characters in RDF metadata.

MysqlContext should follow the guidelines outlined in the following MySQL documentation and use a character encoding like utf8 on at least the "sym" column in the "sym" table.

http://dev.mysql.com/doc/refman/5.0/en/charset-syntax.html