[url] Can't handle IDNs or special characters in URLs

Query: http://räksmörgås.josefßon.org/
/home/stefanor/projects/ibid/test/ibid/plugins/url.py:156: SADeprecationWarning: Use session.add()
  event.session.save_or_update(u)
DEBUG:plugins.url:Error determining title for http://räksmörgås.josefßon.org/: 'ascii' codec can't encode character u'\xe4' in position 50: ordinal not in range(128)
DEBUG:plugins.url:Posted url 'http://räksmörgås.josefßon.org/' to delicious, posted in testchan on test_source by None/1 (stefanor)
Response: Excuse me?
Query: http://en.wikipedia.org/wiki/Ü
DEBUG:plugins.url:Error determining title for http://en.wikipedia.org/wiki/Ü: 'ascii' codec can't encode character u'\xdc' in position 10: ordinal not in range(128)
DEBUG:plugins.url:Posted url 'http://en.wikipedia.org/wiki/Ü' to delicious, posted in testchan on test_source by None/1 (stefanor)
Response: *blink*