Daniel, it looks like you haven't got the python-gst0.10 installed (the checkbox package only recommends python-gst which dates back to Dapper. Can you confirm whether you have that package, if not try installing it, and re-running?
Daniel, it looks like you haven't got the python-gst0.10 installed (the checkbox package only recommends python-gst which dates back to Dapper. Can you confirm whether you have that package, if not try installing it, and re-running?