Comment 3 for bug 500776

please see
http://ubuntuforums.org/showthread.php?t=1362942

It's due to the unstable version (2.22.3-0ubuntu1) of libglib2.0-0.
You can use Synaptic Package Manager to downgrade libglib2.0-0 and libglib2.0-data to the previous version (2.22.2-0ubuntu1).
Mark the package you want to downgrade, and choose "Force version ..." from "Package" on the main menu. Select the previous version and it is done.