> JDBC 3.0 specification
> If a driver does not support the transactionIsolation level
> specified in an invocation to setTransactionIsolation, it is
> allowed to substitute a higher, more restrictive transaction
> isolation level. If a driver is unable to substitute a higher
> transaction level, it throws a SQLException (jdbc3.0 10.2.1)
>
> You can also set the level to read_commited inside the
> setTransactionIsolation method.

You are right. I will fix this bug.

Roman