It's not a bug, it's just something IB doesn't let you configure. Go bugtrack your mom. Sweet plugin - actually posted something asking about a config for this earlier this week.
Thanks for the backup! Don't worry about little old me though. Again, I'd like to stress the usefulness of this plugin - needs to be integrated into the IB core IMO.
The IB Master is on Holidays - once he is there and looks into his forum section, he will realize what to do.
Sorry, completely forgot I posted this. I'm not sure the IB stub changed at all but here it is updated for latest one shipped with HB to be safe