As an FYI....
SQL> select length(config) from alertsource;
So this definitely has nothing to do with the 4000byte limit discussed in the email threads.
This was fixed in 8, but oracle 9 broke blob support in a new way. It is supposed to work with the newest 9 drivers, but I don't use oracle, so I can't verify it for my self.
what type mapping are you using for type Object? LONG RAW has been working for me w/ JBoss 3.0.1 and Oracle 9i.