Traceback (most recent call last):
  File "/usr/share/software-center/softwarecenter/models/appstore.py", line 506, in on_get_value
    icon_file_name)
  File "/usr/share/software-center/softwarecenter/models/appstore.py", line 386, in _download_icon_and_show_when_ready
    url = get_distro().get_downloadable_icon_url(cache, pkgname, icon_file_name)
  File "/usr/share/software-center/softwarecenter/distro/Ubuntu.py", line 221, in get_downloadable_icon_url
    full_archive_url = cache[pkgname].candidate.uri
  File "/usr/lib/python2.7/dist-packages/apt/package.py", line 501, in uri
    return iter(self._uris()).next()
StopIteration