Comment 38 for bug 409621

Adding the regression-update tag as the bug appeared with 3.9-0ubuntu2 in jaunty-updates.
Downgrading that single package to 3.9-0ubuntu1 solves the issue without needing any kind of gconf configuration.

That command will revert to a working libxklavier12:
apt-get install --reinstall libxklavier12=3.9-0ubuntu1

It must be noted that the reverting to that version will make dynamic changes of keyboard stop working.
It's also probably a good idea of holding that package to that specific version until we get a fixed package using:

echo libxklavier12 hold | dpkg --set-selections