If the ~/.config/ibus/bus directory doesn't exist, any gtk app will wake up once per second in an attempt to add a notify on it. The directory should be automatically created to work around this.
This issue has been fixed in upstream source code. I will build new release for fedora soon.
ibus-1.3.2-1.fc13 has been submitted as an update for Fedora 13. http://admin.fedoraproject.org/updates/ibus-1.3.2-1.fc13
ibus-1.3.2-1.fc13 has been pushed to the Fedora 13 testing repository. If problems still persist, please make note of it in this bug report. If you want to test the update, you can install it with su -c 'yum --enablerepo=updates-testing update ibus'. You can provide feedback for this update here: http://admin.fedoraproject.org/updates/ibus-1.3.2-1.fc13
ibus-1.3.2-1.fc13 has been pushed to the Fedora 13 stable repository. If problems still persist, please make note of it in this bug report.