Comment 5 for bug 1028681

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=608802 looks related, but I am hesitant to mark that as the proper upstream bug for this one. If the workarounds hinted at in the resolution work for you, please feel free to add this information by clicking on "Also affects Distribution", selecting Debian, and pasting the URL for this bug report as the upstream bug.

If that works, see also, for the record, LP bug#987711.